Gauss Meters
|
| |
Product |
Price |
View |
|
CELLSENSOR
The World's First Meter to Address the Health Issues Associated with the Cellular Phone and EMF Power Line Controversies.
Cellular Phone Meter and Gaussmeter All in One. For Household use, not for continuous commercial use
Dual use meter featuring both cell phone frequency RF measurement as well as a single axis ELF gaussmeter... at an amazing low price! Calibrated at 835 MHz (with an accuracy of ?3dB), the RF meter measures the intensity of radiation from analog cellular phones and other 900 MHz sources. Two analog scales: HIGH sensitivity 0-1 mW/cm?, and NORMAL sensitivity 0-10 mW/cm?.
Gaussmeter feature is calibrated around 50/60 Hz and also offers 2 scales: 0-5 and 0-50 mG. Remote probe with 2 foot extension cord allows user great flexibility and reach. Both RF and gaussmeter provide audio sound and large flashing light which corresponds to field strength.
Includes complete documentation on how to conduct proper measurements, guide to emissions standards, and methods to reduce unnecessary exposure. Patented & CE compliant. 30-day mfr. warrantee. This is not our most accurate meter (in fact, we have found that it usually does not zero properly), but at this price it makes a great tool for simple surveys, school projects, and many tool box applications.
Simple to use! Move beds away from high fields!
10 to 20% of all homes are covered in "hot spots" of electromagnetic fields over 2 milligauss. With the CellSensor, one can walk the house and in 5 minutes find these hot spots that measure over 2 and avoid placing beds and furniture there. Simple to use, the meter shows the hot spots with needle, light and sound! The meter is normally quiet...showing 0 reading. When you walk by a hot spot, the needle goes up over 2, the light glows, the sound beeps!
Without the meter, it is impossible to know where the hot spots are! A hot spot could be created by sleeping with a TV on the other side of the wall, or by faulty wiring, typical after renovation projects, or by proximity to visible or hidden underground powerlines!
While the reason for the creation of hot spots can be simple or complex, avoiding the hot spots is always very simple. Most hot spots are small, so moving a bed or furniture just a couple of feet usually does the trick! Most hot spots are dealt with that way, just avoid placing furniture there by moving it a little bit!
Simply plug the included probe into the meter, turn it on, place the setting on H for high sensitivity, and the meter needle now is reading 0 to 5 in its display. Readings over 2 are high. Those are the hot spots to avoid. In this same way the meter shows safe distances from appliances such as TVs and microwaves!
Since 10 to 20% of all homes have hot spots, it is important to spend 5 minutes checking the home! It is simple and one gets a great feeling of accomplishment when one move's a child's pillow away from a hot spot!
Here is what Time Magazine wrote about electromagnetic fields:
Time Magazine writes: "Those exposed to fields of 2 milligauss showed a threefold increase in their risk, while children exposed to 3 milligauss showed a fourfold increase in the risk of leukemia. Such as clear progression makes it difficult to argue that factors other than exposure to the electromagnetic field were responsible for the extra cases of leukemia."
Time Magazine writes: the research "...shows an unmistakable correlation between the degree of exposure and the risk of childhood leukemia." The second study "...linked on-the-job exposure to electromagnetic fields and leukemia in workingmen." "What makes the Karolinska study particularly significant is the thoroughness of its design. The investigation encompassed nearly 500,000 people." "One of the most telling results was that the C risk grew in proportion to the strenght of the electromagnetic field. Children with constant exposure to the weakest fields, calculated at less than 1 milligauss (about the same that a coffee maker generates when it is brewing), had the lowest incidence of C." "Numerous reports in the popular press have blared out warnings." "...a growing number of scientific studies suggest that the risk of leukemia and other malignancies rises with exposure to electromagnetic fields."
Time Magazine, October 26th, 1992. Radiation is linked to C, leukemia, headaches, fatigue, cataracts, miscarriages and birth defects. The US EPA recommends "prudent avoidance." In August of 2001, the International Agency for Research on C unanimously concluded that magnetic fields are carcinogens in the same class as DDT and lead. Scientists from the US, UK and 8 other countries "all agreed," said Dr. Larry Anderson. Magnetic fields were also linked in June of 2001 to a six fold increase in miscarriages, by the Kaiser Permanente's research division.
Learn to Detect and Measure EMF Fields
Can measure Cellular Phone RF Radiation
Also measures Electromagnetic Fields Generated by Power Lines, Computer Monitors, TVs, Appliances, Home Wiring, and Other Unsuspected Sources.
Easy to Use
Web Support Available
Free Booklet on RF/ELF Issues Included
(Includes Guides on How to Reduce Your Exposure) and Exterior Probe
Features
Sound and Visual Signals Combined with Analog Measurement Make for an Ideal Meter.
Audio signal with volume control
Light signal
ISO 9001 controlled manufacturing
Comprehensive documentation backed by web support
Competitively priced
Rugged ABS plastic construction, high quality components
CE registered
Requires one 9-volt alkaline battery
Backed by a no-questions-asked 30-day end user warranty
More Information
The average home in America is 10%-15% covered by radiation hotspots above 2 milligauss. Let's look at some pictures of how America relates to power:
As you can see the whole country is electrified. That is why it is important to check for hotspots in your home.
The first problem with powerlines are high voltage lines.
Another problem with powerlines is that you could have a home location which has a powerline behind or under it... that is why it is important to check.
There are all sorts of powerline configurations.
One solution is to bury the powerlines, but good luck doing so because the cost of burying the lines is 10 times the cost of having them aerial.
How is electricity produced and distributed?
Electricity is produced at power plants using different fuels and generating technologies.
When energy leaves a power plant, it is pushed into the electric system at a substation.
Energy travels over long distances on transmission lines to where the power is needed.
On arrival in your neighborhood, the strength of the electricity is decreased at another substation.
Then, a local line carries the electricity to your home or business where a nearby transformer matches the electricity to the needs of your residence.
In a typical county, powerlines criss-cross in all directions!
Ten highest-rated radiation cell phones (U.S.)
All cell phones leak and even if you don't have one of the worst offenders, you should protect yourself and your loved ones by using these EMF cell phone protectors |
29.77 |
View |
|
MicroAlert Model 2: Radio/Microwave Alarm
Radio/Microwave
Alarm
MicroAlert is an alarm that
you wear like a pager that will alert you to the presence of radiofrequency and
microwave radiation. The MicroAlert is important protection for all pacemaker
users, those sensitive to RF radiation from TV or cell phone broadcasts, or
anyone who lives or works in the presence of microwave or RF hazards. Can even
be used to detect audio and video transmission from concealed bugs or the
unauthorized use of cellular phones!
MicroAlert will respond to
as little as 0.1 ?W/cm? in highest sensitivity mode. When MicroAlert is moved
closer to the source of RF radiation, the chirps will become more frequent, and
will become a solid tone when exposure is high. Responds to frequencies from 500
kHz to 3 GHz, although response is not flat over this range. What this means is
that at any given setting, the threshold will vary with frequency. Note: This is
not a high precision meter. Sensitivity information is only a guideline.
The beeping alarm threshold
can be adjusted from no threshold (constant beeping regardless of radiation
exposure), to to a maximum of about 10 microWatts/cm?. It is intended to be an
alarm for cell phones, cell towers, microwave ovens, surveillance bugs, and most
RF transmitters.
Only 1-5/8" x 2-1/4", the 1
oz. MicroAlert uses one Lithium coin cell #2032 which should last about 3 years
with normal use. Includes convenient belt clip.
MicroAlert - Model 2 Instructions
The MicroAlert Alarm detects
radio and microwaves, causing the device to produce and electronic "chirping"
sound / beep when the field strength detected is higher than a level that you
have adjusted / set the instrument to.
Locate the "power" switch on
the top surface of the device, just above the words "OFF ON". Slide this
recessed switch to the "ON" position. You should hear a single beep / chirp when
this has been done, which indicates the battery is good. The unit is now
working. The small black knob marked SENSITIVITY, which is on the right face of
the box, is normally set at the factory to its center position. Notice the line
that is indented into the small black knob. The "center position" means that
this indented line points toward the arrow next to "NORMAL", which is on the
label of the MicroAlert. If you rotate this knob clockwise, it will increase the
sensitivity.
Counterclockwise rotation of
the knob will decrease the sensitivity. The "center position" represents a
certain sensitivity, though the sensitivity depends to some extent on how the
MicroAlert detection face is positioned. If held up in the air with your fingers
on the lower half of the case, with your fingers beside or below the word
"MicroAlert 2", this "NORMAL" sensitivity is about 5 microwatts / cm2. This is
the strength (or technically, the power density) of the radio / microwaves that
will cause the unit to just begin to beep. The beeps will repeat at about 4 per
second if the average power density is just at this threshold of 5 microwatts /
cm2. If you move to an area where the power density is higher, the beeping will
become more frequent (as frequent as 20 beeps per second). Above about 10
microwatts per cm2, the beeping becomes a solid "always-on" tone.
CALIBRATION
PROCEDURE
If the MicroAlert does not
perform / operate as described above, when set at the two most clockwise
positions shown on the diagram, calibration is necessary.
The MicroAlert should beep
even when it is shielded (by being cupped in your hands), if the knob is set to
the "Maximum clockwise travel" position, however it should not beep when set to
the ".1 (3.5)" position if it?s cupped in your hands.
To calibrate the device,
unscrew the single screw on the backside of the MicroAlert (the small
screwdriver is included with your MicroAlert especially for this procedure).
Rotate the black knob to its most sensitive position, at maximum clockwise
travel. Inside the MicroAlert, you?ll notice a copper rectangle with a hole in
it. This is the antenna. Stick the screwdriver through the hole so you can
rotate the small round control under the hole. Rotate this round control so that
the MicroAlert beeps a few times a second. (This beeping should be heard after
you take out the screwdriver and cup the MicroAlert in your hands.) Then turn
the black knob to the ".1 (3.5)" position shown in the diagram. Now the unit
should not beep when cupped. Of course, it?s easiest to do this test in an area
that seems to already have fairly low radio / microwave signal. That is, an area
where there?s not much difference between the microwave field the MicroAlert
picks up whether you hold it upright or cup it in your hands.
BATTERY
Battery life is typically 3
years if it isn?t beeping more than about 5 minutes a day. If you don?t hear a
beep when you turn it on, replace the battery. Also as the battery voltage
drops, the beep volume will be softer / quieter. The weak battery does not
affect the sensitivity level, but if the beep sound becomes too quiet to be
useful to you, then you should consider replacing the battery.
It uses an inexpensive
lithium "2032" (CR 2032) type 3 volt battery, available from any store / site
which has batteries for sale. To replace it, unscrew the center screw and follow
the directions printed inside the MicroAlert on the green board. You need to
push down on the white plastic round tab (looks like a cul-de-sac) with a few
pounds of force until you hear a click, then the battery will be at a slight
angle. Pry the battery out with the screwdriver. If you accidentally put the new
battery in backward, it will not harm anything, but the unit will not work until
you put the battery in with the "+" side facing up. After sliding the battery
into position, push down on the battery on the side which is sticking up the
most, so that it will sit flat in the holder. Replace the cover of the
MicroAlert Alarm.
ADDITIONAL
MICROALERT ALARM OPERATING INFORMATION
Avoid strong static electric
sparks around the MicroAlert. These might shift the sensitivity level and could
require you to calibrate it. For 6 MHz radio waves, the unit is about half as
sensitive as it is in most of its range. This means you should multiply the
numbers in the diagram by two if you know the wave is 6 MHz. It is less
sensitive at lower frequencies than 6 MHz. At 5 MHz, multiply by 3. At 2 MHz,
multiply by 7. At 1 MHz, multiply by 20, and at 500 KHz, multiply by 50 (that
is, it is 1/50 as sensitive). General maximum public exposure to microwaves is
10 microwatts/cm2 in several European countries. In the US, the maximum
allowable is much higher, at approximately 600 microwatts/cm2, for typical cell
tower frequencies (the maximum allowable exposure depends slightly on the actual
frequency of the microwave field in question). The MicroAlert does not detect
600 microwatts / cm2, though it can be used to check European Standards, which
are within it?s range of detection. In most areas in US cities, the level is
below 10 microwatts / cm2.
One-Year Limited
Warranty |
81.50 |
View |
|
Personal EMF Alarm
PERSONAL EMF ALARM
Attention
all pacemaker wearers!
Attention all paranormal researchers!
Attention electrical sensitives!
What could be better than
a meter which alerts you with a loud audible alarm when it encounters a field?
How about a meter which allows you to set the sensitivity of the alarm? How
about a 3 axis meter? How about a meter which does all this for AC magnetic
fields, AC electric fields, and RF radiation?! This meter does all that, for
under $200!!
We are very excited to
offer this simple and useful item for anyone who wants to monitor their EMF
environment without having to stare at their meter for hour after hour. Carry it
with you to alert you when you become exposed to more radiation that you want.
Set it in a strategic location to alert you when a field trips the alarm. You
set the level (threshold) above which the alarm will sound. Can also be used as
a nice analog meter to read field strength.
SPECIFICATIONS
Minimum
Sensitivity
Scale
Accuracy
Frequency
Range
Magnetic 1:
1 mG
0-100 mG
? 20%
50 Hz - 100 kHz
Magnetic 2:
0.2 mG
0-3 mG
? 20%
50 Hz - 100 kHz
Electric:
5 V/m
0-1000 V/m
? 30%
50 Hz - 100 kHz
RF/Microwave:
0.01 mW/cm?
0-1 mW/cm?
Factor of 2
at 2 GHz
50 MHz - 3 GHz
It is important to note
that the magnetic and electric field settings of this meter are frequency
weighted from 30 to 500 Hz, and calibrated at 60 Hz (a 50 Hz calibrated unit is
available as a special order). What this means is that a 2 mG magnetic field at
60 Hz will read "2" on the meter, but 2 mG at 120 Hz will read
"4". From 500 Hz to 1000 Hz, the response is flat ?20%. Above 1000Hz,
sensitivity decreases with increasing frequency. |
189.95 |
View |
|
Q-Link Classic and EMF Detector Combo
SPECIAL: Q-Link Classic and EMF Detector Combo
Beware of imitators. These are guaranteed to be the original Brand name Qlink product you trust!
What takes strokes off golf games, gives athletes a competitive advantage, and relieves stress from EMF (electromagnetic fields)? According to the people who wear them, it?s the QLink Pendants with Sympathetic Resonance Technology? (SRT?). They also report that these personal life-enhancing products help them be more energized, focused and balanced.
Both alternative and traditional doctors have tested the QLink Pendants and report that they neutralize the EMF stress effects from computers, cell phones and other electronic devices.
Athletes say that the QLink Pendants keeps them in that centered state called "The Zone". Runners say wearing a QLink Pendant increases their endurance and gives them a competitive edge.
As the complexity and stresses of modern life increase, the QLink Pendants are fast becoming the product of choice for those people who value performance and optimal well-being.
All you have to do to experience these benefits is to wear one.
The QLink Classic Pendant is durable and waterproof, requiring no batteries and no maintenance. Light-weight, bio-compatible black acrylic, 1.5" across and diamond shaped.
SPECIAL: Q-Link Classic and EMF Detector Combo
CELL SENSOR? EMF Detector and Gauss Meter Information.
Cellular Phone Meter and Gaussmeter All in One. EMF (Electromagnetic Field) Detection & Measurement Meter
The World?s First Meter to Address the Health Issues Associated with the Cellular Phone and EMF Power Line Controversies.
Dual use meter featuring both cell phone frequency RF measurement as well as a single axis ELF gaussmeter... at an amazing low price! Calibrated at 835 MHz (with an accuracy of ?3dB), the RF meter measures the intensity of radiation from analog cellular phones and other 900 MHz sources. Two analog scales: HIGH sensitivity 0-1 mW/cm?, and NORMAL sensitivity 0-10 mW/cm?.
Gaussmeter feature is calibrated around 50/60 Hz and also offers 2 scales: 0-5 and 0-50 mG. Remote probe with 2 foot extension cord allows user great flexibility and reach. Both RF and gaussmeter provide audio sound and large flashing light which corresponds to field strength.
10 to 20% of all homes are covered in "hot spots" of electromagnetic fields over 2 milligauss. With the CellSensor, one can walk the house and in 5 minutes find these hot spots that measure over 2 and avoid placing beds and furniture there. Simple to use, the meter shows the hot spots with needle, light and sound! The meter is normally quiet...showing 0 reading. When you walk by a hot spot, the needle goes up over 2, the light glows, the sound beeps!
Without the meter, it is impossible to know where the hot spots are! A hot spot could be created by sleeping with a TV on the other side of the wall, or by faulty wiring, typical after renovation projects, or by proximity to visible or hidden underground powerlines!
While the reason for the creation of hot spots can be simple or complex, avoiding the hot spots is always very simple. Most hot spots are small, so moving a bed or furniture just a couple of feet usually does the trick! Most hot spots are dealt with that way, just avoid placing furniture there by moving it a little bit!
Simply plug the included probe into the meter, turn it on, place the setting on H for high sensitivity, and the meter needle now is reading 0 to 5 in its display. Readings over 2 are high. Those are the hot spots to avoid. In this same way the meter shows safe distances from appliances such as TVs and microwaves!
Since 10 to 20% of all homes have hot spots, it is important to spend 5 minutes checking the home! It is simple and one gets a great feeling of accomplishment when one move?s a child?s pillow away from a hot spot!
Here is what Time Magazine wrote about electromagnetic fields:
Time Magazine writes: "Those exposed to fields of 2 milligauss showed a threefold increase in their risk, while children exposed to 3 milligauss showed a fourfold increase in the risk of leukemia. Such as clear progression makes it difficult to argue that factors other than exposure to the electromagnetic field were responsible for the extra cases of leukemia."
Time Magazine writes: the research "...shows an unmistakable correlation between the degree of exposure and the risk of childhood leukemia." The second study "...linked on-the-job exposure to electromagnetic fields and leukemia in workingmen." "What makes the Karolinska study particularly significant is the thoroughness of its design. The investigation encompassed nearly 500,000 people." "One of the most telling results was that the C risk grew in proportion to the strenght of the electromagnetic field. Children with constant exposure to the weakest fields, calculated at less than 1 milligauss (about the same that a coffee maker generates when it is brewing), had the lowest incidence of C." "Numerous reports in the popular press have blared out warnings." "...a growing number of scientific studies suggest that the risk of leukemia and other malignancies rises with exposure to electromagnetic fields."
Time Magazine, October 26th, 1992.
Radiation is linked to C, leukemia, headaches, fatigue, cataracts, miscarriages and birth defects. The US EPA recommends "prudent avoidance." In August of 2001, the International Agency for Research on C unanimously concluded that magnetic fields are carcinogens in the same class as DDT and lead. Scientists from the US, UK and 8 other countries "all agreed," said Dr. Larry Anderson. Magnetic fields were also linked in June of 2001 to a six fold increase in miscarriages, by the Kaiser Permanente?s research division.
Includes complete documentation on how to conduct proper measurements, guide to emissions standards, and methods to reduce unnecessary exposure. Patented & CE compliant. 30-day mfr. warrantee. This is not our most accurate meter (in fact, we have found that it usually does not zero properly), but at this price it makes a great tool for simple surveys, school projects, and many tool box applications.
Learn to Detect and Measure EMF Fields
Some information on the CellSensor:
Can measure Cellular Phone RF Radiation
Also measures Electromagnetic Fields Generated by Power Lines, Computer Monitors, TVs, Appliances, Home Wiring, and Other Unsuspected Sources.
Ease-of-Use
Web Support Available
Free Booklet on RF/ELF Issues Included
(Includes Guides on How to Reduce Your Exposure) and Exterior Probe
Features:
Sound and Visual Signals Combined with Analog Measurement Make for an Ideal Meter.
Audio signal with volume control
Light signal
ISO 9001 controlled manufacturing
Comprehensive documentation backed by web support
Competitively priced
Rugged ABS plastic construction, high quality components
CE registered
Requires one 9-volt alkaline battery
Backed by a no-questions-asked 30-day end user warranty
The average home in America is 10%-15% covered by radiation hotspots above 2 milligauss. The first problem with powerlines are high voltage lines. Another problem with powerlines is that you could have a home location which has a powerline behind or under it... that is why it is important to check. One solution is to bury the powerlines, but good luck doing so because the cost of burying the lines is 10 times the cost of having them aerial
We know how well the Q Link pendants work and guarantee they will protect you from EMF and allow you to be more centered and balanced and you have a money back guarantee for 90 days.
"Returns: When returning this product it must be accompanied with all its packaging and related paperwork to receive a refund" |
115.00 |
View |
|
Safe Gauss Meter
Safe Gauss Meter
Would you let yourself or your children be exposed to DDT, lead and chloroform in a daily basis? Not likely. Yet electromagnetic fields, which are also now formally designated as "2B carcinogenic substances" by the International Agency for Research on C (IARC) are found in every American home! Finding fields in the home above 2.0 milligauss with our simple to use Gauss meter and avoiding them is trivial, as they diminish rapidly with distance. Visualize this: all homes have hotspots that family members sleep and sit on, and moving a few feet would solve the problem. Failure to measure is the same as exposing your family to high fields! Act today!
The U.S. EPA says, "There is reason for concern" and advises "prudent avoidance." The Safe Meter help you locate, measure, and avoid magnetic radiation, which has been linked to C and other health problems in children and adults, such as headaches, cataracts, pain and depression.
Use the Safe Meter to: Find the safe distance from your computer monitor. Find hotspots at home, school or in the office in order to avoid them. Find the best location for furniture in order to minimize exposure. Measure fields around appliances (alarm clocks, microwave ovens, televisions, and copying machines). Measure fields near power lines, transformers and hidden wiring, inside and outside your home, school, and office.
EMF Fields and Real Estate Values: When buying a home, it is important to check for EMFs. Homes "sold for 30% less" when exposed to EMFs, as reported by the Wall Street Journal. According to a survey done by Indoor Air Review, 26% of homes have areas that register EMF fields exceeding 3 milligauss.
"...Sweden has concluded that EMFs do lead to higher rates of C-I, frankly was quite impressed by the arguments of the Swedes." - President Bill Clinton
USA Today conducted a survey of 4,567 readers and reported that electromagnetic fields, or EMFs, are the number one environmental concern in America. "EMFs - always present near power lines and working electrical appliances - are liked to such diseases as leukemia and breast C."
"-Studies on cats, rats, and chick brain cells have shown that low frequency electromagnetic radiation interacts with brain activity and could cause a host of negative symptoms from heightened stress and depression, slowed reaction time, and learning disabilities to miscarriages, fetal deformities, and C." Business Week
"This is really harming people." Dr. D. Carpenter, Dean, School of Public Health, NYU
"The Safe Meter worked very well in measuring magnetic fields. I was surprised at the high output from my computer monitor. I am worried about these fields. Now is the time to measure these fields, in order to minimize them.? Lincoln Russin, M.D. Chairman, Radiology Department
Our users include: The New York Department of Health, The World Health Organization, Arvida Realty, Boston Edison, University of Pennsylvania, parents, homeowners and people who want to avoid high fields.
Most experts agree that it is prudent to limit exposure to less than 2.0 milligauss of ELF EMF.
The Safe Gauss Meter is easy to use. Simply turn it on and read the field strength. Owner's manual includes easy to follow advice and helpful hints for your safety.
|
193.95 |
View |
|
RF Field Strength Meter
Tri-field RF Field Strength Meter measures radio frequencies
Technically a "power density" meter, the RF Field Strength Meter detects the electric field of radio and microwaves (RF) from .5 MHz to 3 GHz, and expresses the field strength as power density (.001 to 2000 microwatts/cm2).
This is an extremely sensitive meter which can accurately measure RF background even in rural areas far from any transmitters. The meter reads true power density directly on the display. Unlike other low-cost field strength meters, this meter?s frequency response does not depend on the characteristics of an external antenna; the internal detection system yields a flat response over a very wide range of frequencies.
Accuracy in the FM, TV and cell tower frequency range (30 MHz ? 2.4 GHz) is +/-25%. Sensitivity is low by 50% (-3 dB) at the frequency limits .5 MHz and 3 GHz. (Sensitivity is 25% at 5 GHz. That is, you must multiply the reading by 4 when measuring microwaves at that high a frequency. At 10 GHz, sensitivity is about 10%.)
A High-Pass selector switch allows you to measure either the full bandwidth ("Wide" = 0.5 MHz ? 3 GHz) or to apply a high-pass filter ("Narrow" = 6 dB/ octive rolloff with a knee at 100 MHz) that effectively allows only 100 MHz to 3 GHz through. In practice, this high-pass selector function can be used to estimate one additional parameter: the average frequency of the RF (if it is in the range 10 MHz ? 500 MHz).
The RF Field Strength Meter is directional and it detects only the component of the electric field which has the same polarization as the long axis of the meter. That is, if only a vertically-polarized RF wave is present, but you turn the meter in the horizontal direction, it will essentially read zero. If you subsequently rotate the meter to vertical, it will then read the full power density of the RF wave. Most RF radiation has only vertical electric field, so the full strength can be read by holding the meter vertically. (At the end of this page is more information on how to read radio waves with other polarizations).
The meter has a 4 ? digit display which reads in three ranges: .001 to 19.999, .01 to 199.99, and .1 to 1999.9 microwatts/cm2. For comparison, a low power 100 milliwatt dipole transmitter (typical 49 MHz cordless phone) produces about .010 microwatts/cm2 at a distance of 50 feet. This is 10x the minimum sensitivity of the meter. A FAST/SLOW update switch is normally set in the FAST position so you can quickly measure changes in the RF level. However, if the field strength is fluctuating rapidly, this switch can be set to the SLOW position, which averages the reading over several seconds.
The "zero" level will shift slightly with temperature. This shift is no more than +/- .010 microwatts/cm2 over the meter?s operating temperature range of 30? F to 110? F (-1 to 43? C). Two controls on the right side of the meter correct for this: a button, when pressed, turns off the pre-amplifier, so it is the equivalent of zero field. Then an offset control is rotated until the meter reads zero in the most sensitive "19.999" setting. After one minute or more of warm-up, this should be adjusted. Once adjusted, this need not be readjusted unless the temperature changes by more than 5? F. (Then a shift of about .001microwatt /cm2 will occur).
The RF Field Strength Meter comes with a standard 9-volt battery and a one-year warranty. A low-battery indicator shows on the display when approximately 10 minutes of battery life remain. Electric current consumption from the battery is about 15 ma, with low battery indication at about 7.6 volts.
[The following goes into more detail about using the meter to estimate the average frequency of an RF signal, and also the directionality of RF measurements.]
When measuring an RF signal of unknown frequency, you may notice that the reading is different when the Bandwidth switch is set to "Wide" vs. "Narrow". If so, you can estimate the average frequency (averaged over the power density) of the RF spectrum. If it?s just a wave of a single frequency, you can estimate the frequency of that wave.
This estimate is done by measuring the power density with the Bandwidth switch set at "Wide", and then measuring the power density with the switch set to "Narrow". If these numbers are the same, the average frequency is above 500 MHz. If the "Narrow" number is less than 1% of the "Wide" number, then the average frequency is below 10 MHz. If the "Narrow" number is between about 1% and 96% of the "Wide" number, you can estimate average frequency from the ratio of the two numbers. (A written table is in the instructions).
Although most commercial RF transmitters radiate with a vertical antenna and thus a vertical electric field (so you can hold the meter vertically to measure the full power density), some RF radiation also has some horizontal component, due to reflections or transmitters that have antennas not pointed vertical. If you know where the transmitter is, you will only have to perform two readings to find the transmitter?s total power density at your position. These correspond to "Z" (vertical) and "X" (horizontal, but perpendicular to the direction of the transmitter). In theory, if you point the meter?s long axis toward the antenna (the "Y" direction), you will not detect any radiation from that antenna. This seems counterintuitive. (In fact, there may be some diagonal reflectors near you that produce a small "Y" component coming from the transmitter, but this is not usually significant).
In practice, if the back face of the meter is facing the RF source, and the meter is read first in the vertical orientation and then it is read after being rotated 90? to the horizontal position (with the back face still facing the RF source), the sum of those two numbers will be the true power density from that transmitter. (This addition is a "sum of squares". That is, because power density is proportional to the square of the electric field, then the direct sum of these two numbers, and not the square root of the direct sum, will be the correct magnitude of the power density.) Most RF field sources are principally vertically polarized, in which case only the vertical reading needs to be done. To measure the full power density at a certain point in space, regardless of the sources? locations, measure the vertical first (meter pointed upward). This will usually be the majority of the RF power density. Then make two measurements 90? apart, with the meter?s long axis pointed in the horizontal direction. For example, after the vertical measurement, measure holding the meter in a north-south orientation and then in an east-west orientation. The sum of these three numbers is the total power density at that point in space, regardless of the position of the transmitter or transmitters. An accuracy problem arises however, because your body can block RF radiation, so if an unseen transmitter is located on the opposite side of your body from the meter, the reading will be falsely low. If you hold the meter higher than your head, this problem disappears. The presence of your hand and arm will have some effect on the field strength at the meter, so the most accurate reading is taken by setting the meter on a non-metallic surface or using, for example, a plastic holder. |
320.00 |
View |
|
Tri-field EMF meter
Tri-field measures all three AC Electric Fields, Magnetic wave and Radio Microwave
AC gaussmeter, electric field meter, RF field strength meter combined in one electromagnetic instrument. The TriField Meter (and BroadBand TriField Meter) is an excellent tool for electricians or those curious about EMF fields.
The original TriField ? Meter combines all the features needed for fast, accurate measurements of electromagnetic fields. It independently measures electric field and magnetic field, and is properly scaled to indicate the full magnitude of currents produced by each type of field inside a conductive body. As a result, it "sees" much more than any other electromagnetic pollution meter. [en fran?ais]
Depending on where the knob is set, the meter detects either frequency- weighted magnetic fields (two separate scales), or frequency-weighted electric fields in the ELF and VLF range. It has significant sensitivity at 100,000 Hz, well past the 17,000 Hz horizontal scan of video displays. The radio/microwave setting can detect up to three billion Hz (3 GHz), which lets you gauge radio- wave power, CB and cellular phone equipment, and many types of radars.
This meter is the only one which combines magnetic, electric, and radio/microwave detectors in one package, so that the entire nonionizing electromagnetic spectrum is covered. In addition, the magnetic setting and the electric setting measure true magnitude, a feature found elsewhere only in more expensive meters. If you hold the meter in the center of a room and tip it to various angles, the magnetic reading will stay approximately the same regardless of which way you tip or rotate it. The electric reading is similar, although the presence of your body alters the actual electric field, so readings will vary more. The radio/microwave setting reads the full power of radiowaves when the meter is pointed toward the source.
Surprisingly, the standard TriField Meter is one of the least expensive meters available. The few other meters below $150 read only low-frequency magnetic fields and only in one direction (not true magnitude). The magnetic section of the TriField meter has three field-detecting coils pointing in the X, Y, and Z directions. A circuit amplifies these signals and gives them the proper frequency-weighting (sensitivity increases linearly from 30 Hz to 500 Hz, but with some residual sensitivity up to 100 MHz). A unique network combines the three coil outputs nonlinearly to approximate a true magnitude. The meter is sensitive from 0.2 to 100 milligauss full scale at 60 Hz (or 0.1 to 50 milligauss full scale at 120 Hz, etc.) with a resolution of 0.2 milligauss in the sensitive range. Accuracy is +/-20% at mid-range. A version with flat frequency response (instead of linear sensitivity increase) is also available for the same price.
The TriField Meter comes with a one-year warranty and a 9-volt transistor battery included. This type of battery lasts about 10 hours (total measurement time). When the BATTERY TEST reads low, the battery can be replaced with any rectangular 9 volt transistor or alkaline (which lasts about 50 hours) type. This meter is manufactured in the USA. TriField is a registered trademark of W.B. Lee.
USING THE TRIFIELD METER
A knob on the front has six positions: OFF, BATTERY TEST, two MAGNETIC field sensitivities (0.5-100 milligauss at 60 Hz, and 0.2-3 milligauss at 60 Hz, the second sensitivity to measure weak fields more accurately), ELECTRIC field and RADIO/MICROWAVE power density. The meter face is analog (needle type). A needle reading of one-third of full scale corresponds to either 3 milligauss (or 0.6 milligauss) @ 60 Hz, 3 kilovolts/meter @ 60 Hz, or 0.04 mW/cm2 respectively in the magnetic, electric, and radio/microwave field settings. Average magnetic field strength in North American homes and offices is 1-3 milligauss, so the meter is labeled "HIGH" above these levels.
MAGNETIC FIELD DETECTION
In most homes or offices, some areas are "hot" spots with readings in the HIGH range. Most often, this is caused by magnetic fields, which come largely from unpaired internal wiring. (Contrary to popular belief, power transmission lines and transformers do not generally contribute as much magnetic field as does internal wiring.) Other magnetic sources include video displays, motorized clocks and other equipment, electric blankets and heaters, fluorescent lights and light dimmers, and the transformers that are inside consumer devices. Much of the total field strength is from frequencies that are harmonics or multiples of 60 Hz (120 Hz, 180 Hz, etc.) and 17,000 Hz of video displays. Cars (especially near the front floorboard of electronic ignition cars) and motorcycles have fairly strong fields that are at frequencies higher than 60 Hz. Magnetic field is difficult to shield, but sheet steel is somewhat effective.
ELECTRIC FIELD DETECTION
A few areas in most homes read HIGH in the electric field setting. These include areas near improperly grounded equipment, the front of video screens, and fluorescent lights. Most of these fields can be easily shielded using a grounded metal screen or foil; VDT screens of this type are readily available. You can greatly reduce the strength of an electric field just by placing your hand in front of the source. This effect can be seen using a TriField meter.
MICROWAVE DETECTION
Occasionally, certain areas read HIGH in the radio/microwave setting. These include door seals around microwave ovens, and cellular phones (but not regular radio phones, which are very low-power). Radio/microwaves can be shielded in the same way as electric fields, although the lower frequency radio waves are not shielded by your hand as easily as microwaves are. (Metal screens will shield both.) In the United States, radars and FM transmitters can legally expose residents to moderately high power levels (as high as 10 mW/cm2 briefly or .57 mW/cm2 near cellular towers), but such exposure is not common.
REDUCING FIELD EXPOSURE
Some equipment is sensitive to magnetic fields (ie, a high resolution color monitor may not function properly above 30 milligauss). By seeing "hot" spots in your home and office, you can move equipment or furniture to reduce exposure. If a room has a "hot" spot, fields are generally much weaker elsewhere in that same room. |
120.99 |
View |
|
STETZERiZER Microsurge Meters
Installation Instructions | FAQs | Graham-Stetzer Research | Product Info
Designed to measure home and office Power Quality
Microsurge Meter Operating Instructions
The intellectual property behind the Microsurge meter belongs to the individual who conceived and designed the meter: Professor Martin Graham. The Microsurge meter:
Works for 60 Hz/120 Volt North American and 50 Hz/240 A.C. Volt European systems.
LCD display reads the Volts per second present, which is an approximation for the high frequency energy. High frequencies are the frequencies which are most harmful to equipment, animals, and humans.
The good, marginal, and undesirable range of meter readings are conveniently listed on the back of the Microsurge meter.
Electrosensitive people have reported sensitivities with readings as low as 27 on the Microsurge meter. However, medium or even low Microsurge meter readings should not be interpreted as a guarantee that there is no harmful health impact; only a medical expert can determine that. Caution is required. Some harmful health effects of high frequency energy on humans appear to be cumulative, and possibly non-reversible. Science is inconclusive in this area, although the body of empirical evidence available for guidance continues to expand and stabilize.
Microsurge Meter Design Criteria
Microsurge meters were specifically deigned as a companion to the STETZERiZER filters. The meters measure the level of harmful electromagnetic "energy" present, and their primary use is to guide effective filter installation. Microsurge meters are low cost, robust, and easy to use by non-technical people. The meters were designed to measure harmonics and other high frequency "energy" present, which are the frequencies most detrimental to human health. The meters effectively ignore the effects of 60 Hz power and other lower, less harmful frequencies. Specifically, the meter measures the average magnitude of the changing voltage as a function of time (dV/dt), which naturally emphasizes transients and other high frequency phenomena that change rapidly with time. The measurements of dV/dt read by the meter are defined as G-S (Graham-Stetzer) units (since no standard term is available). The G-S units are a measure of "harmful energy" which is a function of frequency, or more generally, rate of change of voltage or dV/dt.
Using the Microsurge Meter for a Typical Home Installation
Microsurge meters measure the levels of safe, borderline, or dangerous levels of "energy" present. These levels are conveniently shown on the back of the meter for reference. These levels have been developed through research (much of it in Russia and neighboring countries) and confirmed by experience in North America. The levels have been adopted by the Sanitory Stations (Health Departments) of the Republic of Kazakhstan.
Starting from points that typically have the highest readings such as the power input panel, computers, and televisions, the meter is used to measure the initial levels of G-S energy and reduction as filters are added. Once the G-S levels are acceptable at one location, the process should be repeated at the next location. After the installation of the filters is complete, a final confirmation of the G-S levels should be performed throughout the house.
Meter Characteristics
1 in. x 2.75 in. x 4.25 in.
Encased in an off-white plastic covering that fits naturally with home or office decor
Certified by the Government of Kazakhstan as the official means of measuring RF Energy on building wires
Simply plug into a normal electrical outlet to use
Testimonial
NOTE:
This is a Custom Order Item and is not returnable as per our return policy.
"I highly recommend this system for your home and office. I used the meter in my bedroom and found that the radio waves were 11 times the safe level. With the use of the meter I placed filters thru-out the residence and my levels went down to acceptable. I now sleep a full 8 hours from my previous 6 or less and wake up refreshed with my breathe full and in a more relaxed state.
I have never been so impressed with a product before and have become become a major distributor of this system."
Signed Rick Henry,
owner of HealthStores.com
Installation Instructions | FAQs | Graham-Stetzer Research | Product Info |
100.00 |
View |
|
STETZERiZER Filters - For home, office, schools and industrial applications
Installation Instructions | FAQs | Graham-Stetzer Research | STETZERiZER Microsurge Meters
For home, office, schools and industrial applications
A new application of existing science and technology designed to improve power quality in home and office environments
System Overview
The STETZERiZER filter is based upon 100 year-old science and power engineering principles. Newly introduced is the design, which is focused on the needs of the customers in homes, offices, schools, etc. Filters have been extensively applied for decades by industrial users and the electric utility industry itself. The STETZERiZER filter is designed to filter harmonics and other high frequency current (trash) from the electrical environment, thereby reducing the potential for leakage into the human environment and creating additional trash in non-liner loads (televisions, computers, variable frequency drives, energy-efficient lighting, etc.).
The high frequency current (trash) on the neutral wire in the electrical system is positioned to return directly to the power system via the feeder neutral to the substation, and possibly beyond. However, as is often the case, the utility feeder neutral is not adequately sized (as required by the Public Service Commission of Wisconsin). If this is the case, much of the return current will flow through the ground rather than the feeder neutral. Under these conditions, the STETZERiZER filters still provide benefits; this should be seen as local mitigation rather than part of a complete solution that requires an adequately sized neutral return.
At 60 Hz the filters act as capacitors and normally marginally improve the power factor of the customer load, which are normally slightly inductive.
Typical Home Installation
Filters are designed to be installed throughout the home in a pattern that corresponds to the distributed nature of the need. For example, installing two filters close to a desktop computer or a television is normally appropriate and effective. Installing filters, normally from two to six, close to the input power panel is recommended to address high frequency currents entering on the power lines. The total number of filters required depends on the size of the home, the amount of electrical equipment, and the quality of the power from the grid. Twenty filters are normally adequate for a "typical" house.
Installing an inadequate number of filters tends to result in overloaded filters, leading to an ineffective solution. The preferred installation method is to be guided by the STETZERiZER Microsurge Meter, which measures the amount of high frequency energy present. Readings of 30 or lower indicate an acceptable environment, while readings of 50 or higher indicate a need for additional filters. Readings between 30 and 50 are marginally acceptable, but should be reduced if anyone in the area is electrically sensitive.
The reader is encouraged to review the STETZERiZER Microsurge Meter Product Description, the STETZERiZER Filter Installation Instructions, and the STETZERiZER Filter Frequently Asked Questions.
Filter Characteristics
2 in. x 2 in. x 4 in.
Encased in an off-white plastic covering that fits naturally with home or
office decor
Fits into a normal home or office electrical plug
Certified by Underwriters Laboratories and the Canadian Standards Association
as safe for home and office use
NOTE:
This is a Custom Order Item and is not returnable as per our return policy.
Testimonial
"I highly recommend this system for your home and office. I used the meter in my bedroom and found that the radio waves were 11 times the safe level. With the use of the meter I placed filters thru-out the residence and my levels went down to acceptable. I now sleep a full 8 hours from my previous 6 or less and wake up refreshed with my breathe full and in a more relaxed state.
I have never been so impressed with a product before and have become a major distributor of this system."
Signed Rick Henry,
owner of HealthStores.com
Buy 15 filters for $448.95
Most houses use approximately 12 to 15 filters and any unused filters can be given to your friends.
Installation Instructions | FAQs | Graham-Stetzer Research | STETZERiZER Microsurge Meters |
30.00 |
View |
|
Single Axis Digital Gaussmeter
Couldn't be easier to use, just turn it on and get accurate reliable readings. Perfect for situations needing high resolution measurements of AC magnetic fields without spending a lot of money. Large LCD display reads 0.1 -199.9 mG over the ELF range of 30 - 400 Hz. Provides readout in both mG and microTesla. Calibrated to within 4% ? 3 digits at 50/60 Hz. This single axis meter samples every 0.4 seconds when flipped on with slide switch. Requires one 9V battery. One year limited warrantee.
Like all single axis meters, this meter must be rotated during use to find the proper orientation to the magnetic field being measured to get proper readings. |
79.95 |
View |
|
AC/DC Gaussmeter
If you have a need to measure strong magnetic fields from DC to 5 kHz,
this is the unit to do it. Large 3? digit display and highly accurate
(?5%) hall effect, this is a great meter for comparing and classifying
magnets, checking cargo for air shipments, measuring residual magnetism
in steel or iron, evaluating magnetic shielding effectiveness, or even
checking AC fields from transformers, motors, and distribution centers
where current use is high. Includes 6 foot long cable with transverse
probe. Made in USA. 1 year mfr warranty.
Range: ?1-1000G DC, 1- 700G RMS
Resolution: 1 Gauss
Bandwidth: DC to 5 kHz
Accuracy: ?5%, traceable to NIST
Meter Size: 2.3"W x 4.75"L x 1.0"D
Probe Size: 3.5" L x 0.25" D
|
526.00 |
View |
|
ElectroSensor
With the push of a button, this simple and accurate gaussmeter measures the level of
magnetic field emitted by all common electrical appliances and equipment. An easy to read
10 LED light bar scale gives readings from 1.3 to 30 mG in small increments. The
ElectroSensor has a detection range of 50-60 Hz with an accuracy of ?3dB. A pickup coil
in the tip of the unit can be rotated for increased directionality. EMF risk can be avoided if
you know where it is. If you are looking for a low cost, user-friendly meter, here it is!
AAA battery included.
|
24.95 |
View |
|
Switchable 1:3 Axiss Gaussmeter
Compact and easy to use, this digital unit can measure ELF and/or VLF
magnetic fields in either single axis mode (to help identify the
orientation of the field) or 3-axis mode (which makes routine
measurements much faster and more reliable). Range from 0.01 mG to 1999
mG. 3? digit display. 3% accuracy from 45 to 5000 Hz but useful from 13
Hz to 75 kHz. Very simple: One knob controls range, one knob for single
or 3-axis, and one on/off switch. Uses standard 9V battery (included).
Made in USA, with NIST type certification. One year mfr warranty.
|
279.00 |
View |
|
Tri-Field Extended Range Broadband Meter
This modified version of the standard Trifield Meter has the following advantages:
? The magnetic field sensor has enhanced sensitivity to frequencies below 50Hz
(for example, sensitivity at 5 Hz is 33 times greater than the regular Trifield meter)
? The RF sensor is frequency-flat over the extended range of 100 kHz - 2.5 GHz.
This fills the gap of 100 kHz - 50 MHz missed by the regular Trifield meter
(However sensitivity is shifted to a range of 0.026 - 260 mW/cm?)
SPECIFICATIONS
Minimum
Sensitivity
Scale
Accuracy
Frequency Range
Magnetic 1:
1 mG
0-100 mG
? 20%
5 Hz - 100 kHz
Magnetic 2:
0.2 mG
0-3 mG
? 20%
5 Hz - 100 kHz
Electric:
10 V/m
0-1000 V/m
? 30%
5 Hz - 100 kHz
RF/Microwave:
0.01 kV/m
0-1 kV/m
Factor of 2
at 2 GHz
100 kHz - 2.5 GHz
With these extended ranges, you can detect slow moving static
electric and magnetic fields, concealed RF transmitters, cellular phone
radiation, very weak AC electric fields from wall switches and
concealed wiring, and lots of other low frequency EMF sources you might
have missed, as well as fine tuning your shielding efforts!
|
189.95 |
View |
|
Hall-effect Gaussmeter
High linearity and high accuracy (3%) from 0-10 Hz.
4 ranges: 2, 20, 200, 2000 Gauss. 3? digit display, yields 1 mG
resolution (on lowest scale). 200 mV recorder output. Includes a 9V
battery plus AC adapter. Versatile enough to classify magnets, measure
residual magnetism, and check fields from DC circuits. Made in USA. 2
year mfr warranty.
|
525.00 |
View |
|
Bandpass AC Gaussmeter 50Hz
Low cost, portable, single axis home model
with large, easy-to-read 3? digit display. What makes this meter unique
is the very narrow bandpass filter which only allows the calibration
frequency to be read. Gives very accurate readings without distortion
from harmonics.
Range: 0.1 - 199.9 milliGauss
4% Error Guarantee based on EPA report
Bandwidth: 11 Hz @ 3dB
Deluxe carry case and 9V battery included
1 Years Parts & Labor warranty, Made in USA
|
199.00 |
View |
|
Kilogaussmeter
This is a high quality, reasonably priced digital meter & it is
invaluable for reliable measurement of permanent magnets, magnetized
rocks and metals, the Earth's magnetic field, and any DC magnetic
field. Offering 3? digit bipolar display, 9V battery powered and comes
with an AC power adapter for extended benchtop use.
Coiled cable transverse probe (High Linearity Hall Generator) is
included providing nearly linear response from DC to 10 Hz. Useful 4
ranges covering 0 - 20, 200, 2000, 20,000 Gauss with a 3% accuracy
guarantee. Two year parts and labor warrantee. 200mV DC recorder output
(which can be used with
Extech Digital Multimeter with PC Interface to interface
this unit with your PC) is included.
|
525.00 |
View |
|
Basic Digital DC Gaussmeter
This meter couldn?t be easier to use,
simply point and shoot. One button activation conserves battery life
and eliminates need for setting range. Automatic zero-ing. 3? digit LCD
readout indicates field strength. Meter also gives polarity
information. (Green LED indicates South pole, Red LED indicate North
Pole).
0-1999 mT range (0-19,990 Gauss)
1 mT (10 Gauss) resolution
?2% accuracy over the whole range
Transverse Hall effect probe is built in. Very fast and reliable. Great for comparing magnets and quality control. |
425.00 |
View |
|
3-Axis DC Gaussmeter
Measure magnets
Monitor Earth?s magnetic fields
Check DC motors
Measure fields from low voltage (DC) systems
Easiest way to check Air Freight for compliance
Detect the movement of iron/steel objects (automobile traffic, conveyor belts, concealed weapons, etc.)
Rugged device connects to your PC or laptop though the COM port.
Measures in X, Y, and Z axis as well as SUM mode, all simultaneously!
Very simple software shows field strength in digital and graphic
format.
Range: -2.0000 to +2.0000 Gauss
Minimum sensitivity: 67 microGauss
Accuracy: ?2% of full scale
Includes everything you need to get started: probe, 9 ft cable, AC/DC power converter and software. Made in USA.
|
895.00 |
View |
|
Strong Field AC Gaussmeter
Tired of gaussmeters without enough muscle to handle the strong
magnetic fields commonly found near vacuum cleaners, electric can
openers, hair dryers, power tools and the like? This unit offers high
accuracy, single axis, 50/60 Hz readings of both weak fields (down to
0.1 mG) and very strong AC fields (up to 19990 mG). Simple one-button
operation, 3? digit LCD display, and useful from 30Hz - 300Hz. Readout
in microTesla with simple x10 conversion for mG. Requires one standard
9V battery. A lot for the price!
|
99.95 |
View |
|
Datalogging 3-Axis Gaussmeter with PC interface
Designed to provide quick,
reliable and easy measurements of electromagnetic field radiation
levels around power lines, home appliances and industrial devices.
Displays microTesla or milliGauss, XYZ or 3-axis, and offers: Data hold
and Peak hold functions. Extremely sensitive (down to 0.01 mG, but
accuracy limited below 1 mG) with range all the way up to 1999 mG. Want
more? 2000 datalogging capacity with time/date stamp for field use and
RS-232 Optical interface with Windows 98/2000/XP software and cable
included. Large, easy to see display. Gets about 100 hours from 6 AAA
batteries, included.
SPECIFICATIONS
Display
3? digits. Max. indication 1999
Range
20/200/2000 milli Gauss 2/20/200
micro Tesla
Resolution
0.01/0.1/1 milli Gauss 0.001/0.01/0.1
micro Tesla
Number of Axis
Three axis
Band Width
30 Hz to 2000 Hz
Accuracy
?(3%+3d) at 50/60HZ, ?(5%+3d)
at 40Hz to 200HZ, -3dB at 30Hz to 2000HZ
Datalogger storage
999 readings
Sampling Time
Approx. 0.5 second
Battery Life
Approx. 100 hours
Operating Temp and Humidity
0 to 50?C (32 to 122?F) below 80%RH
Weight
Approx. 5.82 ounce
Dimension
6.06(L) x 2.83(W) x 1.37(H) inch
Accessories Included
Operation Manual , 6 size AAA batteries,
Software for windows and RS-232 Cable
|
309.00 |
View |
|
|
Hall-effect Gaussmeter Axial & Transverse
High linearity and high accuracy (3%) from 0-10 Hz.
4 ranges: 2, 20, 200, 2000 Gauss. 3? digit display, yields 1 mG
resolution (on lowest scale). 200 mV recorder output. Includes a 9V
battery plus AC adapter. Versatile enough to classify magnets, measure
residual magnetism, and check fields from DC circuits. Made in USA. 2
year mfr warranty.
|
650.00 |
View |
|
|
Bandpass AC Gaussmeter 60Hz
Low cost, portable, single axis home model
with large, easy-to-read 3? digit display. What makes this meter unique
is the very narrow bandpass filter which only allows the calibration
frequency to be read. Gives very accurate readings without distortion
from harmonics.
Range: 0.1 - 199.9 milliGauss
4% Error Guarantee based on EPA report
Bandwidth: 11 Hz @ 3dB
Deluxe carry case and 9V battery included
1 Years Parts & Labor warranty, Made in USA
|
199.00 |
View |
|
Linear Hall Eeffect Sensor
These semiconductor chips are the heart of a DC magnetometer probe. When a DC magnetic field is applied, a voltage is produce which is proportional to the strength of the field. They also be used to make a very simple DC magnetometer… schematic included! It is possible to position 3 units orthogonally and link them in series to make a “3-axis” DC magnetic field sensor.
The Hall-effect integrated circuit included in each device includes a Hall sensing element, a linear amplifier, and a CMOS Class A output structure. Integrating the Hall sensing element and the amplifier on a single chip minimizes many of the problems normally associated with low voltage level analog signals.
High precision in output levels is obtained by internal gain and offset trim adjustments made during the manufacturing process.
These features make Linear Hall Effect Sensor ideal for use in position sensing systems, for both linear target motion and rotational target motion. They are well suited for industrial, hobby and educational applications over extended temperature ranges, from -40°C to 125°C.
A 3-pin ultramini SIP for through-hole mount. Lead (Pb) free, with 100% matte tin plated leadframe. These devices have a quiescent output voltage that is 50% of the supply voltage. Operating Voltage: 4.5 - 6 V. Typical Sensitivity: 1.3 mV/G |
2.00 |
View |
|
XYZ Axis EMF Tester
This EMF tester is designed to provide user a quick, reliable and easy way to measure magnetic field levels around power lines, electrical appliances, wiring and industrial devices.
- One button scrolls through X, Y, and Z axis readings
- Covers bandwidths from 30 Hz to 300 Hz
- Wide measuring ranges (3 ranges of µTesla and 3 ranges of mGauss)
- Big digit LCD display
- Data hold button
- Simple to operate
- Easy to use remote probe, fits hard-to-reach spaces
Unit
Range
Resolution
Accuracy
µTesla
20
0.01
±(4% + 3d)
200
0.1
±(5% + 3d)
2000
1
±(10% + 5d)
mGauss
200
0.1
±(4% + 3d)
2000
1
±(5% + 3d)
20,000
10
±(10% + 5d)
Complete with 3ft (930mm) sensor cable, 9V battery, and hard carrying case. 1 year warranty. |
149.99 |
View |
|
E.L.F.-Zone Gaussmeter
What this meter lacks in resolution it makes up with ease of use and very low cost. Will measure ELF/VLF magnetic fields in the frequency range of 20 - 10,000 Hz, with a minimum sensitivity of .25 mG. Laboratory tested and documented for accuracy.
* Three LED lights signal field strength: 0 - 2.5 mG ("safe")
* 2.5 - 7 mG ("caution")
* 8 or more mG ("danger")
Single axis sensor, on/off toggle switch. One fresh 9V battery required. Useful for preliminary surveys of home, car, or office. Very popular for paranormal work too! |
12.95 |
View |
|
Budget Buzz Stick
Common ELF magnetic field frequencies are within the range of human hearing. This simple set up converts the AC magnetic signal directly into a dramatic corresponding sound signal. A 60 Hz powerline field sounds like a 60 Hz hum (a low note on piano keyboard). Harmonics can easily be heard, as well as clicks, static, and hash. LED displays are especially noisy. The strength of the field is proportional to loudness.
Unit includes a single axis probe on 2 foot cable and audio amplifier with adjustable volume. You can even use an optional earphone/headset for discreet operation. Use it to “sniff out” sources of interference, offending EMF, check shielding designs. Makes a great educational tool. Requires one 9V battery. |
16.94 |
View |
|
|
2200mAh rechargeable battery for Spectran Datalogger
Optional 2200mAh rechargeable battery for extended run time for Spectran Datalogger |
75.00 |
View |
|
DMM with PC Interface
High sensitivity DMM with all the multiple functions you need including data hold, backlight, frequency, AC/DC voltage to 0.1 mV. Perfect for logging data to your PC from magnetic field and other probes. Use with all your EMF probes. Measures voltage, resistance, amperage, capacitance, frequency, even temperature! Use it alone in the field or connect to your PC to log, save, and display data. Sample from 1 to 120 readings per minute.
Auto/Manual ranging
High brightness back light
Auto power off
Data Hold
Software is easy to use, nice graphics, and very intuitive. Includes K-type thermocouple, software CD, optically isolated USB cable. 4 LCD display with automatic polarity indication. Note: V and COM jacks are not standard ¾ inch apart. Use an adapter for dual banana jacks.
Ranges:
AC Voltage: 0.1mV ~ 1000V ±(1.0%+3 digits)
AC Current: 0.1mA ~ 10A ±(1.5%+3 digits)
DC Voltage: 0.1mV ~ 1000V ±(0.5%+3 digits)
DC Current: 0.1µA ~ 10A ±(1.5%+3 digits)
Resistance: 0.1O ~ 40MO ±(0.5%+2 digits)
Capacitance: 0.01nF ~ 100µF ±(3.0%+5 digits)
Temperature: -55°C ~ 1000°C ±(2.0%+1°C)
Frequency/Duty cycle: 10Hz ~ 100KHz
Includes the all important 0 - 600 mV AC range so it can be used with the Body Voltage Sensor, and all magnetic field probes listed. Also includes:
PC-Link software CD
Test leads
PC Interface wire
9V battery
K type thermocouple
Capacitance test clip
|
89.95 |
View |
|
|
Tri-field Flat Frequency Response EMF meter
This modified version of the standard Trifield Meter has all the same specifications with this one important difference: magnetic field response is NOT frequency weighted. No need to specify 50 or 60 Hz calibration.
Tri-field measures all three AC Electric Fields, Magnetic wave and Radio Microwave
AC gaussmeter, electric field meter, RF field strength meter combined in one electromagnetic instrument. The TriField Meter (and BroadBand TriField Meter) is an excellent tool for electricians or those curious about EMF fields.
The original TriField ? Meter combines all the features needed for fast, accurate measurements of electromagnetic fields. It independently measures electric field and magnetic field, and is properly scaled to indicate the full magnitude of currents produced by each type of field inside a conductive body. As a result, it "sees" much more than any other electromagnetic pollution meter. [en fran?ais]
Depending on where the knob is set, the meter detects either frequency- weighted magnetic fields (two separate scales), or frequency-weighted electric fields in the ELF and VLF range. It has significant sensitivity at 100,000 Hz, well past the 17,000 Hz horizontal scan of video displays. The radio/microwave setting can detect up to three billion Hz (3 GHz), which lets you gauge radio- wave power, CB and cellular phone equipment, and many types of radars.
This meter is the only one which combines magnetic, electric, and radio/microwave detectors in one package, so that the entire nonionizing electromagnetic spectrum is covered. In addition, the magnetic setting and the electric setting measure true magnitude, a feature found elsewhere only in more expensive meters. If you hold the meter in the center of a room and tip it to various angles, the magnetic reading will stay approximately the same regardless of which way you tip or rotate it. The electric reading is similar, although the presence of your body alters the actual electric field, so readings will vary more. The radio/microwave setting reads the full power of radiowaves when the meter is pointed toward the source.
Surprisingly, the standard TriField Meter is one of the least expensive meters available. The few other meters below $150 read only low-frequency magnetic fields and only in one direction (not true magnitude). The magnetic section of the TriField meter has three field-detecting coils pointing in the X, Y, and Z directions. A circuit amplifies these signals and gives them the proper frequency-weighting (sensitivity increases linearly from 30 Hz to 500 Hz, but with some residual sensitivity up to 100 MHz). A unique network combines the three coil outputs nonlinearly to approximate a true magnitude. The meter is sensitive from 0.2 to 100 milligauss full scale at 60 Hz (or 0.1 to 50 milligauss full scale at 120 Hz, etc.) with a resolution of 0.2 milligauss in the sensitive range. Accuracy is +/-20% at mid-range. A version with flat frequency response (instead of linear sensitivity increase) is also available for the same price.
The TriField Meter comes with a one-year warranty and a 9-volt transistor battery included. This type of battery lasts about 10 hours (total measurement time). When the BATTERY TEST reads low, the battery can be replaced with any rectangular 9 volt transistor or alkaline (which lasts about 50 hours) type. This meter is manufactured in the USA. TriField is a registered trademark of W.B. Lee.
USING THE TRIFIELD METER
A knob on the front has six positions: OFF, BATTERY TEST, two MAGNETIC field sensitivities (0.5-100 milligauss at 60 Hz, and 0.2-3 milligauss at 60 Hz, the second sensitivity to measure weak fields more accurately), ELECTRIC field and RADIO/MICROWAVE power density. The meter face is analog (needle type). A needle reading of one-third of full scale corresponds to either 3 milligauss (or 0.6 milligauss) @ 60 Hz, 3 kilovolts/meter @ 60 Hz, or 0.04 mW/cm2 respectively in the magnetic, electric, and radio/microwave field settings. Average magnetic field strength in North American homes and offices is 1-3 milligauss, so the meter is labeled "HIGH" above these levels.
MAGNETIC FIELD DETECTION
In most homes or offices, some areas are "hot" spots with readings in the HIGH range. Most often, this is caused by magnetic fields, which come largely from unpaired internal wiring. (Contrary to popular belief, power transmission lines and transformers do not generally contribute as much magnetic field as does internal wiring.) Other magnetic sources include video displays, motorized clocks and other equipment, electric blankets and heaters, fluorescent lights and light dimmers, and the transformers that are inside consumer devices. Much of the total field strength is from frequencies that are harmonics or multiples of 60 Hz (120 Hz, 180 Hz, etc.) and 17,000 Hz of video displays. Cars (especially near the front floorboard of electronic ignition cars) and motorcycles have fairly strong fields that are at frequencies higher than 60 Hz. Magnetic field is difficult to shield, but sheet steel is somewhat effective.
ELECTRIC FIELD DETECTION
A few areas in most homes read HIGH in the electric field setting. These include areas near improperly grounded equipment, the front of video screens, and fluorescent lights. Most of these fields can be easily shielded using a grounded metal screen or foil; VDT screens of this type are readily available. You can greatly reduce the strength of an electric field just by placing your hand in front of the source. This effect can be seen using a TriField meter.
MICROWAVE DETECTION
Occasionally, certain areas read HIGH in the radio/microwave setting. These include door seals around microwave ovens, and cellular phones (but not regular radio phones, which are very low-power). Radio/microwaves can be shielded in the same way as electric fields, although the lower frequency radio waves are not shielded by your hand as easily as microwaves are. (Metal screens will shield both.) In the United States, radars and FM transmitters can legally expose residents to moderately high power levels (as high as 10 mW/cm2 briefly or .57 mW/cm2 near cellular towers), but such exposure is not common.
REDUCING FIELD EXPOSURE
Some equipment is sensitive to magnetic fields (ie, a high resolution color monitor may not function properly above 30 milligauss). By seeing "hot" spots in your home and office, you can move equipment or furniture to reduce exposure. If a room has a "hot" spot, fields are generally much weaker elsewhere in that same room. |
127.95 |
View |
|
Elf Gaussmeter 4190
This meter is like the 4180 on steroids. All the sample features, plus improved accuracy, wider range, and internal Software Data Logging
Analog buffered output (8K samples /sec) for viewing analog waveform on an oscilloscope, spectrum analyzer, or similar test equipment which is useful for determining harmonic content and other waveform properties. Output scaling is 2V FS (200 mG or 2000 mG).
Plus DC voltage level proportional to the displayed level of the magnetic field which is useful for driving chart recorders, data loggers, or other data acquisition equipment. 10 mV/mG; 2V FS (200 mG or 2000 mG). Software CD included.
Basic Accuracy (> 4 mG, 40-80Hz)
± (1% + 1 digit) typical
Measuring Range
0.1 to 1999 mG; 0.01 to 199.9 µT
|
576.00 |
View |
|
Peak/Hold 2-Range Gaussmeter
Nice versatility in a low cost 1-axis meter. Comfortable in the hand and easy-to-read, large digital 3½ display. Peak feature allows user to let the meter run over extended periods to identify “worst case” fields. Hold feature will hold current readout.
Digital display toggles between mG or microT
2 Ranges: 0.1-200.0 mG (0.01-20.00 microT) and 1-2000 mG (0.1-200.0 microT)
Frequency Range: 30 to 400 Hz
Accuracy: ±3% + 3 digits at 50/60 Hz
Sampling rate: 2.5 times per second
Max Hold and Data Hold
Uses standard 9V battery (included)
|
99.95 |
View |
|
DC MilliGauss Meter
Want to measure fields up to 2000 mG with 0.01 mG resolution without breaking the bank? Need to measure freight for IATA complaince? This is the meter.
4½ digit display with two ranges: +/- 1999.9 and +/- 199.99 mG. Updates three times per second. Because the Earth's ambient field is typically about 500 mG, three "offset" controls allow you to add or subtract up to 600 mG with precision of .01 mG. Therefore, the Earth's field can be subtracted out when required. If reading in the more sensitive 199.99 range, this field neutralization feature is often necessary, because the field is usually stronger than 200 mG.
The wide dynamic range of the display, along with the large range of offset and high stability of the meter, allow for stable detection of small changes in a large background field. On the higher sensitivity range, changes of .01 mG can be reproducibly measured in up to +/- 800 mG of background field. On the lower sensitivity range, absolute field of 0.1 mG resolution can be measured in up to +/- 1999.9 mG of background field.
The "axial" sensor is at the end of an eight-wire cable that is four feet, which means it detects the component of the field that's in the same direction as the cable points. The meter reads negative when pointing toward a magnet’s south pole and positive when pointing toward north. At only 1 mm x 0.2 mm, the active sensor area is much smaller than most other sensors, allowing very precise magnetic measurements in small areas (such as thin films) or with high gradients, when necessary.
The meter comes with a NIST-traceable certificate of calibration, a 9-volt alkaline battery, a 120 VAC adapter (North American style). One year mfr warranty. Made in USA. |
590.00 |
View |
|
3-Axis DC Magnetometer
All these years, we have searched for a 3-axis meter for DC magnetic fields. Now, we are pleased to supply this simple, and cost effective unit.
Measure magnets
Monitor Earth’s magnetic fields
Check DC motors
Measure fields from low voltage (DC) systems
Easiest way to check Air Freight for compliance
Detect the movement of iron/steel objects (automobile traffic, conveyor belts, concealed weapons, etc.)
Rugged device connects to your PC or laptop though the COM port. Measures in X, Y, and Z axis as well as SUM mode, all simultaneously! Very simple software shows field strength in digital and graphic format. Even operates in compass mode!
Range: -2.0000 to +2.0000 Gauss
Minimum sensitivity: 67 microGauss
Sampling rate variable from 10 - 154 samples per second
Accuracy: ±2% of full scale
Data can be exported as text file
Includes everything you need to get started: probe, 9 ft cable, AC/DC power converter and software. Made in USA. |
895.00 |
View |
|
DC Magnetic Field Viewer Card
Finally, a way to actually "see" DC magnetic fields from permanent magnets or magnetized metals without messy iron filings! You can use this amazing film over and over to view the location and number of poles on any magnet. Just lay the card on the magnet to see the polar pattern. Magnetic poles appear as dark areas and the light areas represent where the N and S poles meet. A great inexpensive magnetic detector for finding objects in your environment that have become magnetized. Uses no batteries. Also great for science projects. Dimensions: 2-1/2" x 4" |
2.75 |
View |
|
4180 ELF GaussMeter
Lightweight and completely self contained, this easy to use gaussmeter from FW Bell is ideal for commercial or home use. Accurately measures Extremely Low Frequency Magnetic Fields generated by electrical equipment. Applications include detecting magnetic field emissions from a wide variety of sources, including video display terminals, AC power lines, office equipment, household appliances, and all types of electronic equipment. Look at these key features: 3˝ digit LCD display, Auto Zero, Min./Max./Peak Hold, Auto Range and Relative Mode. Selectable X, Y, or Z Axis plus Vector Summation, true RMS reading. User selectable Gauss or Tesla readout. Built-in software eliminates the need for complex calibration procedures. User prompts on the LCD allow fast, simple pushbutton operation. Low battery detection. Complete with instruction manual, soft carrying case, and four AAA batteries. USB interface allows power through the USB (cable not included), can also be powered by external 5VDC adapter (not included).
Basic Accuracy (> 4 mG, 40-80Hz)
± (2% + 1 digit) typical
Frequency Response ±5%
30 to 2kHz
Update Rate (display)
2 readings/sec
Measuring Range
0.1 to 599 mG; 0.01 to 59.9 µT
Minimum Resolution
0.1 mG /.01µT
|
324.50 |
View |
|
|
4190 ELF GaussMeter
This meter is like the 4180 on steroids. All the same features, plus improved accuracy, wider range, and internal Software Data Logging
Analog buffered output (8K samples /sec) for viewing analog waveform on an oscilloscope, spectrum analyzer, or similar test equipment which is useful for determining harmonic content and other waveform properties. Output scaling is 2V FS (200 mG or 2000 mG).
Plus DC voltage level proportional to the displayed level of the magnetic field which is useful for driving chart recorders, data loggers, or other data acquisition equipment. 10 mV/mG; 2V FS (200 mG or 2000 mG). Software CD included.
Basic Accuracy (> 4 mG, 40-80Hz)
± (1% + 1 digit) typical
Measuring Range
0.1 to 1999 mG; 0.01 to 199.9 µT
|
576.00 |
View |
|
VLF 3-axis Gaussmeter
Truly unique. You get 3-axis VLF readout with simultaneous frequency indication (1-200 kHz), peak hold, alarm, datalogging, and RS-232 connection. Wow! Portable and easy to use. Covers 0.2 – 2000 mG in 2 ranges. Typical applications include checking the frequencies and magnetic fields produced by such equipment as computer monitors, television sets, video display terminals, induction heaters, industrial, scientific and medical equipment and ground wave energy network. Hard case, 9V alkaline battery & DC adaptor included. Two year parts and labor warranty. Made in the USA
Specifications:
Frequency response: 1-200 kHz
Analog output for X, Y and Z axis waveform
Predominant frequency indicator for each channel
Isotropic sensor… Switchable to single axis mode
True RMS measurement with peak hold
Error 3% maximum
16 character x 2 line display
Weight: 1 lb. (453.6 grams) w/ dimensions 7"x4"x3"
Sensor: External three Axis X, Y, Z Air coils type with 8" handle
Datalogging up to 32,000 data points, adjustable interval
Record data of all channels w/ RS-232 communication port
Auto or manual ranging with auditory alarm
Resolution at scale: 200 mG: 0.2 mG, 2000 mG: 2 mG
Power consumption: 400 mW
|
1495.00 |
View |
|
RF/Gauss Field Meter
The NATURAL EM METER detects radio/microwaves and changes in extremely weak static (DC or "natural") electric and magnetic fields. Using both a needle type meter and audible tone, it detects: radio transmitters, geomagnetic storms, unusual magnetic solar activity, electrical activity of thunderstorms, leaky microwave ovens, magnetized rocks or bed frames, analog cellular phone EMF output, and concealed surveillance bugs. Because it can sometimes detect the electrical presence of a person, this versatile meter can even be used in paranormal studies. Sensitive to changes in electric fields of as little as 3 V/m with a full scale deflection at 1000 V/m. Will measure magnetic field changes as small as 0.5% of the Earth's magnetic field (2.5 mG) and as high as 100 microtesla (1000 mG). RF sensitive down to 0.01 mW/cm˛, with a full needle deflection at 1 mW/cm˛ over the frequency range of 100 kHz to 2.5 GHz.. 9v battery included. One year manufacturer's warrantee. |
99.95 |
View |
|
|
|
|
