EMF Detector – How to Use a Multimeter

by susi on May 23, 2012

Using a Multimeter to Detect Electromagnetic Fields (EMF's)

Using a Multimeter to Detect Electromagnetic Fields (EMF's)

This post details how to use a multimeter to measure EMF’s (ElectroMagnetic Fields) in your home or working environment. If you want to know more about why you would want to measure EMF’s in your home or office, please read EMFs and Your Health..

You will need a multimeter capable of measuring millivolts. A millivolt is one thousandth of a volt i.e., 1 volt is equal to 1,000 MV (millivolts).

I purchased a RadioShack Digital Multimeter Model 22-812.  This one was more expensive than required for this task but we needed to use it for other purposes.  You should be able to pick up a good digital multimeter for about $30.

Set the multimeter dial to dBM ˜V. On my multimeter, it’s two clicks up from the OFF position.

My multimeter has a “Range” button which allows me to set the voltage display in volts or millivolts. I can select the display to show 0.000 volts, 00.00 volts, 000.0 volts, 0000 volts, or 000.0 millivolts. The “Earthing” book uses the 0.000 volts format.

Now, let’s see how electrically charged my body is. Remember, you and I are living antennas which attract electricity creating a surface charge on our bodies.

Insert one lead from the multimeter (red or black) into the splitter using an alligator clip to ensure a solid metal-to-metal connection. Insert the end of the Earthing Mat lead into the splitter. Insert the splitter into the grounding port of the electrical outlet. Now the multimeter is grounded and the Earth Mat is grounded.

Take the red probe and hold it snuggly between your thumb and forefinger.

The number shown on the multimeter is the electrical charge on the surface of your body. Now place your other hand on the Earthing Mat.  This new number shows how grounding significantly reduces the electrical buildup on your body. When I was not grounded, the multimeter registered .882 (882 millivolts) volts, grounded, it measured .015 volts (15 millivolts). These numbers fluctuate but you’ll get a good relative idea of the impact of grounding.

Clint Ober, one of the authors of the Earthing Book, stated in an interview with Dr. Mercola that zero millivolts is the best as it is at the same voltage as the earth’s potential; however, anything under 100 millivolts is acceptable and the closer you get to zero, the better.

1. Set the multimeter dial to dBM ˜V.

2. If you have a “Range” button, set it to the desired display as described above

3. Ground the multimeter and the Earthing Pad

4. Snuggly grasp the remaining multimeter lead between your thumb and forefinger. That number is the surface charge on your body. This number will vary depending on your location relative to the electrical appliances in your home.

5. Place your remaining hand on the grounded Earthing Pad.  That number is the surface charge on your grounded body. The lower the number the better. Subjects that were tested and featured in the Earthing Book averaged 1.7 millivolts after grounding while lying in their own beds.

Earthing  naturally protects us from the effects of EMFs; however, the more important health benefit of Earthing is providing the body with free electrons from the Earth. The scientific research and hypotheses related to Earthing point to a major impact on the inflammatory process as a result of this electron transfer. 

{ 5 comments… read them below or add one }

Frances Denoncourt May 25, 2013 at 7:55 pm

I’m trying to measure my body voltage before grounding.
I have a Commercial Electric MAS830B multimeter, however I’m not sure where to set the dial.
When it’s on 200m on the green side with the letter ‘V’, it does not show 0.000, so my readings fluctuate from 00.1 to 00.6 or more when not grounded.
When grounded, it goes to 40-70 or more. But it looks like a minus sign on display.
I’m so electronically challenged. I even looked in my “Electronics for Dummies” book to figure out where to set the multimeter. Not much that I understood. The manual that came with it didn’t get into that kind of information. I think it’s one of those things where you have to know what you’re doing before the manual makes any sense.
I tested with my auto seat mat which I brought inside to use at the computer on the floor or my computer chair.
I use the wrist band in bed and do feel that tingling.
We’re testing because we’re thinking of buying the half bed sheet and want to see some numbers.
Thanks so much for your help,
Frances Denoncourt


GASPERINO MISTRETA September 1, 2013 at 12:21 pm

where can I buy accessories for Earthing——fittings, ground lines, clips etc.


susi September 2, 2013 at 12:09 pm

Hi Gasperino,

Simply Google “earthing accessories” and you’ll see several websites that offer Earthing Accessories. You can also make your own, if you are knowledgeable, and pick up the parts at Home Depot, Ace or Lowes. If you are just starting out, I would suggest using the least expensive product to obtain the best ground and that would be the bands.


cherie September 7, 2013 at 1:53 pm

Without any knowledge of Multimeters, I ran out and purchased the cheapest one, which did not work. I found a site that explained why and am attaching to help your readers with their purchase.

“There are all kinds of multimeters on the market, but to find one specific to measuring body voltage is a bit more difficult. Here’s some things to look for in finding the right one:

Make sure it can measure Volts, you’ll know this by finding a V with a ~ or – above it. It might also say “Volts AC” or “V AC” which is what we want to measure.

Check the range of the volts, we want it be able to go really low…down to nearly one-thousandth of a volt (0.000). So if the multimeter you’ve found says something like 200, 500 or 750 for the V or AC Volt section – that type will not work, we need it to go down lower. (this was the type I purchased originally) You need one that features Auto Range capability. Not be limited by only going down as low as 200 or 500 volts. Make sure it’s digital that will give you the most accurate reading.”

Hope this helps!


susi September 8, 2013 at 6:16 pm

Hi Cherie,

Thanks for the great input. We all appreciate your time and effort!


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