emf lcd monitors factory

In this post, I’m going to tell you how computer monitors emit EMF radiation, how much they emit, how you can test this, and what you can do about it.

(Just a quick note before we move on. I would love for you to take just a minute and check out Nicolas Pineault’s groundbreaking E-book “A Non-Tinfoil Guide To EMFs.” It is the most entertaining and informative book on EMF radiation you’ll ever read, I promise.)

There are primarily three types of radiation sources that a computer monitor is likely to have, UV light radiation, x-ray radiation, and EMF radiation. Which radiation, and how much they emit, will depend largely on the monitor. Let’s talk a little bit about each kind.

There are basically two categories of monitors: cathode-ray tubes, and the flat-screen monitors that you see today, which are typically either LED or LCD based screens.

Prior to about 2001, almost all monitors were using cathode-ray tube (CRT) technology to power the screens. However, these types of monitors generate, and leak, small amounts of highly dangerous X-Ray Radiation. Although this had been recognized since the 60’s as being dangerous, it was not until the late 1990’s that manufacturers really fell under scrutiny for continuing to make a knowingly dangerous product.

This led to the manufacturing of Light Emitting Diode (LED) and liquid crystal display (LCD), which is what I used for nearly all modern monitors (and televisions)

Exposure to x-radiation is obviously extremely harmful and is an unfortunate bi-product of older style cathode ray tube (CRT) type monitors. The electronics in these old monitors generated extremely high voltages that would often result in x-ray radiation.

Although x-radiation that you could receive from one of these older style CRT monitors is dangerous and harmful, it is much less than you would receive from a medical x-ray machine or the x-ray at the dentist. This is the reason that they have you wear led vests to protect your body from the radiation.

Later versions of CRT monitors were slightly safer, as manufacturers began to take steps to reduce this x-ray radiation by adding lead to the cathode ray tube, which helped to cut down on this issue.

The EMF meter that the gentleman is using in this video is the older version of the Trifield meter, the company now has the new TriField TF2 (read my review), but we’ll talk about that a bit more down below in the section about measuring computer monitor radiation.

Ultraviolet light (UV) is much less harmful than x-ray radiation, but high amounts over a long period of time can still certainly cause harm. Some monitors actually have a fluorescent lamp that is part of the illumination. When the ultraviolet light strikes a white phosphor, the visible light that you see is created, but it has the side effect of sometimes leaking ultraviolet light out.

Luckily they make screen protectors for computer monitors that not only block 100% of the UV light but also help to filter out blue lights that can cause computer vision syndrome (CVS) from longterm exposure to computer monitors.

The EMF Radiation from your computer monitor will be relatively small and come from circuitry in the back of the unit. As you can see from the video above when he is testing an LCD monitor, there is still a noticeable amount of EMF radiation, but you have to be quite close.

The Long Island Power Authority did a study where they measured the average EMF radiation from many home appliances. Although they did not specifically test LCD or led computer monitors, they did test led and LCD televisions. Here are the numbers they came up with at the following distances:

As you can see, there is quite a large amount of EMF radiation at VERY close distances, but if you sit at least three feet away from the screen, you will not much need to worry about EMF radiation exposure. Be sure that you don’t sit so far away that you strain your eyes, but do keep at least 3 feet between you and the screen.

This applies to almost anything that you want to test, but you first need to start by getting a high-quality EMF meter. I personally use, and love, the new TriField TF2 (read my review). It is super easy to use, incredibly accurate, and measures every kind of EMF radiation, which you’ll realize is really important. If you need to start with a lower cost version I also like the Meterk (read my review).

Getting a good EMF meter is one of the absolute best things you can do if you care about the dangers of EMF radiation. Whether it’s figuring out how much radiation your Smart Meter is emitting, or testing to see if your microwave is leaking radiation, or comparing cell phone radiation, having a good EMF meter is the first step in knowing what the problem is, and knowing if your solutions are working.

First of all, computer monitors do emit a relatively small amount of EMF radiation at reasonable distances. So the absolute best thing you can do is keep at least a reasonable distance (3 feet or more) between you and the monitor whenever possible.

They don’t seem to make a good shield for computer monitors that are actually intended to block EMF radiation, but they do make this window film that you can pick up on Amazon, that you could cut to fit the size of your monitor if you really wanted to reduce the amount of radiation you’re exposing yourself to.

This page describes an attempt to make a computer that is tolerable for the electrohypersensitive by reducing electromagnetic emissions There are three sections, moderate, low and ultra low EMF computer setups..

This was the first feeble attempt at making a computer tolerable. Wires are everywhere, the user is sitting near an LCD monitor, the keyboard and mouse are primitive and the electrical circuits are rudimentary.

A note on the tutorial: No cooling fans are required if it"s all engineered properly by optimizing the voltage output of the transformer. The power supply and filter have been improved. Even though all monitors are equipped with LEDs, they are pulsed on and off for dimming, thus producing EMF.

engineer who suffers from Electrosensitivity. Improvements in lower EMF emissions are literally felt. His quest is to be able to comfortably use a computer again. For him, the average computer or laptop is intolerable after just several minutes of use (symptoms include an unbearable heaviness of being (almost like a slow motion electrocution), clinching chest pains, tremors (especially in the forearms), wailing tinnitus) and a headache. Whereas this computer can be used for longer periods and with less symptoms.

The laptop drives an external LCD monitor which is a 17" retrofitted with an LED backlight. The switching power supply circuit board has been removed from the chassis and replaced with a custom linear power supply, also remoted 20 ft. Another custom, linear current regulated power supply drives the LEDs. Components within the LCD monitior itself are shielded with mu metal.

The USB keyboard and trackball are shielded internally and externally with mu metal, decreasing EMF exposure. Direct from the factory, the keyboard and trackball caused severe tinnitus, which the shielding improved.. Here is a pic of the mu metal that was placed inside the keyboard. It was a tedious job drilling all of the holes. There is also a sheet of mu metal on the bottom of the keyboard. Keyboard Shield

The meter can be obtained on-line from stores such as LessEmf. For anyone suffering from Electosensitivity such meters are essential to track down offensive sources of electromagnetic pollution.

Three computers are compared with respect to their EMF emissions, from the low EMF customized computer, to the infamous EMF power house DELL XPS/Ultrasharp monitor (2007WFP) which causes immense physical pain after just a few minutes of exposure. Listed are the measurements of EMF emitted from the various components (mouse, keyboard, monitor, etc.). The first computer is the low emission computer described here composed of an HP L2005 laptop with a customized external 17" LCD monitor, the second is a Dell Dimension E520 desktop (Core 2 6320 1.86 GHz, 2 Gig RAM) with a 17" DCLCD LCD monitor, the third a Dell XPS 410 Desktop (Core 2 6320 1.86 GHz, 2 Gig RAM, NVIDA GeForce Graphics card, sound blaster card) with an 20" Dell Ultrasharp monitor (2007WFP)

As for magnetic fields, the Dell XPS computer emits a staggering 100 milli gauss towards the rear, whereas the low emission computer emits at most 1.0 milli gauss. The Dell E520 is in the middle at 50. Also notice the magnetic field emitted by the Dell XPS monitor (2007WFP) at 37 milli gauss in the front, whereas the low emission Samsung is a mild 0.2. The DCLLCD monitor also emits a mild 1.5 at the front.

An LCD monitor is most likely the worst offender to the electrosensitive. It has long been known that it contributes to severe tinnitus and other ill feelings.

However, even with the remoted LCD power supply, a low frequency form of tinnitus still persisted. This was alleviated a little jby shielding the main LCD circuit board inside the monitor with a sheet of mu metal.

The last improvement was the addition of a low pass filter on the power line feeding the main board of the LCD monitor. The filter, placed near the main board, substantially reduced the higher frequencies from traveling back onto the power cable, thus lowering the measured magnetic field on that cable, and noticeably made the computer more tolerable. The LCD monitor is shrouded with two layers of Veilshield, a fine wire mesh which reduces high frequency RF noise. This is where the monitor stands at this point, despite the Radio Frequency noise (measured with the AM radio) which is still being emitted, especially from the front of the monitor.

Linear supplies have the advantage of providing relatively clean power compared to switching supplies. Linear supplies eliminate the impulses at 30k Hz. The downside to linear supplies is the magnetic field at the transformer, which can be minimized by matching the transformer size to the load, and double windings. The magnetic field at the power supply is 4.0 milli gauss (with heavy shielding) which is reduced to 0.2 at a distance of 1 ft. The 60 Hz magnetic field doesn"t seem to travel far, so it can be managed if kept at a distance. An advantage to the switching supplies is the very low magnetic field, 0.2 milli gauss shielded. Overall, the comfort level is greater with custom linear power supplies when compared to switching supplies. Linear power supplies have diode bridge rectifiers which do produce noise as they are switched on and off. This noise does find it"s way on the house power lines and into the computer. See Home EMF Measurements on how to remediate this noise with shunt capacitors across the diodes.

Low pass filters ineffectively clean up the high frequency noise produced by the switching supplies before the DC power enters the monitor and LEDs. A 60 Hz component is prominent in the LCD power supply, though no such noise is in the power to the LEDs. It is therefore concluded that the 60 Hz noise is generated by the LCD monitor. 60 Hz noise is also prevalent in the power supplied to the laptop computer, so the noise is not singular to the LCDs. A passive low pass filter place between the monitor and power supply sufficiently cleans the 60 Hz noise. The magnetic field on the LCD power line is negligible.

Here is a snapshot of the LCD power (switching supply - AC component only) without any filtering, LCD Power No Filter The overall noise has an amplitude of over 100 milli volts (peak to peak) out of a 5 volt DC power supply. The "halo" or hazy ghost about the noise are the infamous impulses, intrinsic to switching power supplies, which occur every 30k Hz. Next is a shot of the LCD switching power with filtering, LCD Power Filtered The Total amplitude has been reduced to 40 milli volts, and the high frequency noise has been significantly reduced from 40 milli volts down to 10. Here is a pic of the LED power (switching suppy - filtered), LED Power Filtered. There is no 60 Hz noise seen in the LED power. The prevalent high frequency, switching mode noise has an amplitude of 10 milli volts, up to 35 including the "halo" of 30k Hz impulses.

The power produced by the linear supplies is considerably cleaner and better regulated. The 60 Hz noise generated by the monitor is quenched with a passive LC filter, the amplitude which is less than 20 milli volts. This sinister looking waveform is the unfiltered noise emitted by the main board of an LCD monitor. LCD Power The waves are broadcasted as electromagnetic waves. But you don"t have to show an electrosensitive person the broad spectrum of the composite wave, and how the 60 Hz wave fiercely dips to a vertical "V". Rather, he can feel it. Non-sensistive people may not feel these waves, but they are imputing deleterious biological affects. The mid-band 30k Hz noise, seen as a halo, can cause a myriad of acute affects to electrosensitives. There is also an entire spectrum of higher frequencies not visualized by an oscilloscope.

Much worse are the emissions from a mini projector. Here is a pic of the noise emitted by a Mitsubishi Pocket LED Projector, again using a clean linear power supply: Projector Power Viscous spikes over three volts in amplitude explains why this projector causes severe discomfort to use, and therefore is not an alternative to the LCD monitor. Heavy shielding is hopelessly inadequate for such a bothersome device.

Shielding can result in a fiasco, or in other cases may help. For instance, the shielding on the main board of the LCD monitor was essential to relieve some of the tinnitus. Yet attempts thus far in shielding the entire LCD monitor resulted in a drastic increase in tinnitus. Also shielding the LCD power cable in flexible steel conduit was terribly uncomfortable.

The Ethernet to USB adapter produces quite a bit of EMF noise which finds its way onto the USB cables. Though the Venue feels mildly tolerable for the initial few minutes of exposure it causes extreme tinnitus, headache and chest pains after just a short time. Symptoms are exacerbated by the the modem and on-line connectivity

The dell Inspiron 5000 with 10th gen. Intel and solid state drive has a built-in RJ45 Ethernet socket, so a USB/Ethernet converter is not required. The laptop emits relatively weak lower frequency magnetic fields, as measured with the Trifield. But the AM radio picks up strong RF. Most disconcerting are the random/infrequent pulses of microwaves that have been detected in the RF band of the trifield, even with Blutooth off and in airplane mode. It"s bio-effects are less guttural due to weaker low frequency fields, but a burning face, and blinding tinnitus and headache set in. The faster USB controller emits RF in the 135 Mhz band, as measured with the MFJ. The 19v switching mode power adapter that"s included with the pc emits intense EMF. It should be avoided and only used to charge the battery while away. Here"s a 19 V linear power supply. It comprises a toroidal transformer, low noise FET input OP amp, and a MOSFET transistor. This power supply is free of RF. Wiring shown here adapting the linear power supply to the laptop, including a grounded DC filter

This project has shown a way to reduce the emf emissions from a computer to make it more tolerable for those with certain sensitivities. Even though a mediocre gauss meter indicates the near magnetic field is low, the computer (particularly the LCD monitor) still emits offensive EMF (detected by an AM radio), and therefore can be used for only a limited time per day.

The task of building a practical computer that is completely tolerable for the emf sensitive is nearly an impossible feat. Such a system must be designed from the ground up, suppressing the bothersome spectrum of frequencies emitted by the various components. One cannot entirely depend on measurements alone, but must also test a computer for a while and use your subjective response as a guide in finding a relatively compatible computer. Then you must limit your daily use, otherwise risk sensitization - a condition where one gets severe symptoms after just short exposures.

Three computers were compared with respect to their EMF emissions. The evaluation has indicated that the emitted magnetic field (measured near the equipment, with a gauss meter and AM radio) fairly indicates the degree of subjective electrosensitive symptoms. However, offensive fields abound at a distance even though meters are not sensitive enough to detect them. For more information refer to this article on Low EMF Computing

The EPE Conseil ESI 24 monitor is a 3 in 1 Electro-Magnetic Field EMF detector for all frequencies. EMFs are generated by popular wireless devices like cell phones, cordless phones, baby monitors, tablets, Wi-Fi-enabled computer equipment, cell phone towers, wireless smart meters, among others. With this device, you can measure magnetic fields, electric fields, and radiowaves simultaneously.

Ahlbom IC, Cardis E, Green A, et al. Review of the epidemiologic literature on EMF and Health. Environmental Health Perspectives 2001; 109 Suppl 6:911–933.

Greenland S, Sheppard AR, Kaune WT, Poole C, Kelsh MA. A pooled analysis of magnetic fields, wire codes, and childhood leukemia. Childhood Leukemia-EMF Study Group. Epidemiology 2000; 11(6):624–634.

SCENIHR. 2015. Scientific Committee on Emerging and Newly Identified Health Risks: Potential health effects of exposure to electromagnetic fields (EMF): http://ec.europa.eu/health/scientific_committees/emerging/docs/scenihr_o_041.pdf, accessed August 15, 2015.

Features: Three axis ( X, Y, Z direction ) EMF measurement | The EMF tester is quick, reliable and provides easy way to measure electromagnetic field radiation levels around power lines, electrical appliances and industrial devices | Wide measuring ranges i.e, 3 ranges of 20 micro Tesla, 200 micro Tesla & 2000 micro Tesla

The EMF Detector is cost effective, hand-held instrument EMF radiation at wide bandwidths from 30 Hz to 300 Hz | LCD display, jumbo digit size | Data hold | Separate probe for easy operation | DC 9V battery power supply | Hard case included.

Battery: DC 9 V battery | Supply Scope: 1 unit of Lutron EMF-828 Meter, 1 unit of Probe, Operation Manual, Factory Calibrated Certificate, Hard Carrying Case | Applications: HT & LT Power Lines, Computer"s Monitor, TV Sets, Video Machinery

The EPE Conseil ESI 24 monitor is a 3 in 1 Electro-Magnetic Field EMF detector for all frequencies. EMFs are generated by popular wireless devices like cell phones, cordless phones, baby monitors, tablets, Wi-Fi-enabled computer equipment, cell phone towers, wireless smart meters, among others. With this device, you can measure magnetic fields, electric fields, and radiowaves simultaneously.

At Tech Wellness we’re all about finding ways to limit EMF exposure – a task that’s become increasingly challenging in our “Wireless World”. We’ve had a lot of viewers writing in asking about baby monitors and if their little ones are being exposed to dangerous energy coming from these cameras. And that"s why we think the best baby monitor is a wired baby monitor.

Wireless Baby Monitors Emit High Levels of EMF radiation. Take a look at any of the Wireless baby monitor videos in this blog and you"ll see us measure and detect high amounts of EMF exposure.  We found a do-it- yourself Wired Baby Monitor that emits 0 EMF Radiation! Scroll down to see everything you need to create this DIY Baby Monitor system and a step by step guide to putting it together.

Going through the wiring can cause dirty electricity,  but it"s a shame that some EMF click bait sites are confusing people into thinking that it"s better for your baby to be exposed to wireless radiation.

Our Tech Wellness Expert is an electrical engineer and EMF instructor and the renowned Institute of Building Biology and according to him we need to worry so much more about wireless radiation.

Yes, there will be dirty electricity as a result of sending signal over the wires via the adapters.  Our point of view is that it is the lesser of two EMF evils.  Here, Larry Gust, one of the most qualified experts on EMF mitigation in the world, explains:

However, just like putting a Smart Meter in your home, the wireless signals combine with the hard electrical wiring in your home and create dirty electricity.  Dirty Electricity is a form of EMF that can"t be measured by a EMF radiation or RF meter,  but it"s a type of EMF that can still cause harm.

But the dirty electricity comes off the wiring- get 2" from the wiring and your exposure goes way way down.  Wireless radiation fills your home and unlike electrical EMF, there are 1,000"s of research studies that show wireless radiation causes harm.

At Tech Wellness we review lots of wireless items- including Baby Monitors for EMF safety.  The Baby Monitor Videos are included at the bottom of this page.

You"ll also find solutions to a healthier EMF-less home environment  and solutions for the little ones in your life in our Kids and Family section.  From the best WiFi Free Games for your children to play to cute crayon stylus to keep magnetic energy from little fingers.

Because of my EMF Sensitivity Syndrome, I"ve created an EMF free home. I use these fabulousRF and EMF metersto guide my electromagnetic radiation exposure. You can work toward a more RF radiation- free environment by wiring up as much as possible.

I mention in the Wired Baby Monitor EMF Demo video that I"m going to put thislittle meter on the site--because it"s super easy to use. No numbers.  Just a simple Low to Extreme reading with color coded lights.

After measuring several of the popular baby monitors (all wireless), we started searching for a “wired” solution – and it turns out they’re pretty hard to find!  We"ll let you know when one is available. Meanwhile . . .

We have a step by step video guide showing how to take a wireless camera and make it a Zero EMF emission Camera and use your computer, phone or tablet and turn them into the Zero EMF radiation Monitors!

And, here"s a great hack that allows your tablet or laptop "monitors" to be TOTALLY wired. We do it with a special Ethernet Adapter.  We have one to turn your hard wire your tabletand one that hard wires your androidor laptop--which means you access the internet without a WiFi connection.

We Tested For Sound and EMFThis video at the top of this blog shows you how it works as well. No RF radiation wireless exposure and camera and sound looked great!!!

When you use the the D-link Adapters to send the WiFi signal through the electrical wires in your home, there will be resulting dirty electricity.  Larry Gust explains that having dirty electricity on your wiring compares much more favorably to having the Electromagnetic Radiation exposures to baby and family that come from wireless baby monitors.

We"re constantly scouring the marketplace for options to Wireless Baby Monitors and we expect there will be others on the market soon. There once was the BabyMoov, which we purchased and tested, the video is still on YouTube, but the company stopped manufacturing it.

We found the Matop Camera online, which claims it has an ethernet/WiFi option.  But the reviews are not good.  We only recommend and do demo"s detecting EMF for products that consumers find worthy.

Also, the marketplace for wired baby monitors is confusing. When you search them in Amazon, products like the Angel Care and the Nanit come up.  We"ve tested them both- see the videos below- Spoiler Alert:

All wireless devices emit RF radiation a type of EMF. Today in our wireless obsessed world, our radiation exposures to EMF shave never before been this continual and intense.

And keep your little ones-3 and up, safer by letting them play games on phones and tablets on Airplane Mode.  Airplane Mode means they are not exposed to EMF Radiation.  There will still be magnetic radiation as you"ll see in the video on the Stylus Product Listing--and these cute Stylus crayons will keep them safely distanced from the magnetic EMF.

Babies brains are just developing. Children absorb more RF radiation than adults  from wireless baby monitors because their brain tissues are more absorbent, their skulls are thinner and their relative size is smaller.

Please read our articles for info on reducing exposure and watch our videos detecting the RF Radiation from a wireless Baby Monitors. Even the "safer" audio only Baby Monitors.

We have EMF exposure video demonstrations of the Nanit Baby Monitor, The Owlet Baby Monitoring System, The Snuza and The Angel Care Wireless Baby Monitor here:

It"s been my sincere pleasure to help you find a great alternative to wireless baby monitors and the toxins they expose the whole family to. Thank you for reading and thank you for sharing the video and information-it make me and everyone here at Tech Wellness very proud to be a part of our passion and our mission.

So yes, the Bebcare can mean less EMF exposure for your baby when you use it as sound only and the baby"s room is quiet.  BUT be aware that the Bebcare does EMIT EMF radiation.  The radiation levels are as high as any baby monitor when the Bebcare hears baby, or sounds in baby"s room.  It"s also on anytime the camera function is on recording baby.