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Author Archive: EM Watch

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EMF-Shielding Paint

EMF-shielding paint is a special coating which contains conductive particles, either metallic or carbon. It is used to shield radio-frequency EMF, and is not effective against low-frequency magnetic fields.

The paint is generally quite thick, and black in colour (carbon-based paints). I understand that you can paint over it, but you may need two coats to properly mask the colour.

Be prepared to measure the EMF with a suitable meter before you start, and after you finish -to check the paint’s effectiveness and your own workmanship!

We recommend that EMF shielding paint be electrically grounded for best results. Some people use strips of conductive tape for this purpose (applied to the wall first, then painted over. (The tape also has to be connected to an electrical earth.) Or you can use a grounding kit made for the purpose. (See below.)

Finally, you may need more paint than you expect for each coat, and you may need more than one coat in some places.

Warning: Not having used these products, our recommendations rely heavily on the experience of others!


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February 10, 2020 | By | Reply More

EMF-Shielding Fabric

One of the most convenient and effective ways of shielding radio-frequency EMF is to use a fabric designed for the purpose. The purpose is always to screen out radio-frequency EMF, but the uses are varied. For example, EMF-shielding fabric may be used for

  • Net curtain at a window
  • Backing material for a normal curtain
  • Bed canopy
  • Construction of an enclosure for partial screening of EMF-emitting equipment (e.g. routers)
  • To make items of clothing for personal EMF protection
  • To screen interior walls

Some fabrics are better suited to some uses than others.

And please check the width and length of the product you select, to make sure it meets your requirements.

When using fabric for EMF screening, it is useful to be able to check that it produces the desired effect. For this purpose, a good radio-frequency EMF meter is highly recommended.

Amazon has many products in this category. Here are some reputable ones to start your search …


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January 17, 2020 | By | Reply More

EMF Books

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For the serious EMF researcher there are many books to help you understand every aspect of electromagnetic radiation. We have selected some of the more useful titles for this category.

Of course, you already have access to lots of information about EMF on the internet! But the problem, as you will be aware, is the mis-information mixed up with the information! Sometimes it can be hard to tell the difference!

That’s why it might make sense to invest just a little of your hard-earned cash in a good book, by an expert in the subject, so your knowledge of EMF – and its health consequences – has a solid foundation!

These are my favourites at the moment …


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January 16, 2020 | By | Reply More

Combined LF and RF Meters

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These meters are handy if you want to be able to check for both low-frequency EMF and radio-frequency EMF in one instrument.

As you might expect, they are more expensive than meters which test for only one type of radiation.

The Trifield TF2 deserves special mention, because unlike most EMF meters, it shows both a digital reading and an analogue reading (using digital technology rather than an actual moving needle.) One advantage of the analogue approach is that you can see very rapid fluctuations in the signal, rather than just showing an average or a peak reading (both of which it does show, simultaneously). I like it. We have used this meter professionally, and can recommend it.

Here is our selection …


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January 16, 2020 | By | Reply More

Radio-Frequency EMF Meters

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Radio-frequency EMF is produced by all transmitters of radio signals. This includes transmitters outside of the home, and some inside.

Outside the home are TV station and radio antennae, mobile phone masts, and radar transmitters (at airports and some military installations), to name a few.

Inside the home are wi-fi routers and other wi-fi devices, computers, electronic pads, mobile phones, cordless devices such as phones and baby monitors, wireless burglar alarm components, wireless heating control units, microwave ovens, smart TV units and smart meters – to name a few.

Radio-frequency EMF has been associated in numerous studies with many biological effects and health issues. Most of us are exposed to ever-increasing EMF levels, so we believe that it makes a lot of sense for everyone to monitor the level of their exposure, and possibly take action to reduce it.

A good radio-frequency EMF meter thus becomes a basic necessity. With its help, most people can find various ways to reduce their exposure, and that of their family.

Don’t confuse radio-frequency EMF with low-frequency EMF. These are two entirely different kinds of radiation. Good radio-frequency EMF meters tend to be expensive, unfortunately.

The best meters are what is known as triple-axis. They measure the EMF in three different planes at the same time, and sum those components into a single measurement. It saves you having to do it manually, as you would with a single-axis meter, which just measures the radiation in one plane.

But most triple-axis meters allow you to operate the meter in one plane as well, which can be useful when you are trying to locate an EMF source. (Point the meter, and see which direction gives the highest reading.)

Some meters are more sensitive than others. A more sensitive meter will be able to detect a lower level of radiation – nice to have, but not essential if you are just trying to reduce very high EMF levels to something less extreme.

When comparing the specifications of various meters, bear in mind that they may all be using different units of measurement (e.g. mV/m or V/m or uW/m2 or mW/m2 or W/m2 or mW/cm2 or uW/cm2 or nW/cm2) Some of these units result in measurement values with lots of decimals, which may make them harder to understand.

I prefer mV/m or uW/m2. Many meters allow you to choose the measurement unit. Make sure you know what units you are using when making comparisons.

In general, radio-frequency EMF meters are somewhat harder to use than low-frequency EMF meters, and it helps if you are technically minded.

Here are some of the meters which seem to offer good features at reasonable value.


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January 15, 2020 | By | Reply More