Electro Magnetic Field EMF help needed

[H2O]

So I got a new EMF meter that measures magnetic field .
Electric transformers generate some emf , microwave,and smart electric meters ,cell phone when it rings all generate emf the epa has a recommended exposure limit of 0.5 to 2.5 emf, I checked my ecotech MP40S and the meter is reading higher EMF then a cellphone tower and microwave put together when mp40 are all the way up full speed the EMF is at 14.39
I'm not sure what to do dump them or keep them ? What's your 2 cent on EMF ?

 

[mcarroll]

It's kind of interesting, but I have no point of reference. DO you have submersible pumps you can check with less water surrounding them? I suspect (guessing) that water is a good insulator for EMF, so maybe all EM pumps generate EMFrequecies. (All pumps are EM pumps.)

 

[mcarroll]

Whether to keep the Vortech's on the other hand....

 

[clownfish chris]

My take depends on your actual exposure to the EMF. How big is the EMF? If you are experiencing almost 15 Gauss for an extended time while sitting on your couch I would say there is a problem. If the measurement is reduced to less than the 2.5 Gauss only a few inches away from the pumps there is nothing to be concerned with at all.

 

[H2O]

Yes it's only the mp40 I unplugged everything the meter was reading 0.3 all around the house then ones mp40 gets plugged in the meter go to the max ones I turn mp40 to low the EMF go down by almost half but it's still way over the epa recommend safety limit

 

[H2O]

The reading peak was at 14.40 Like 6 inches away from mp40 running at 90% full speed

 

[clownfish chris]

I wouldn't worry about that at all. It is the ambient reading that really matters.
I had the head of my bead on a wall opposite the breaker box in my house for a while. The EMF where I had my head at night was between 5 and 7 Gauss. I always woke up with a headache and had some weird dreams. When I talked to my Doc about it is when he suggested I check the EMF because it only happened when I slept at home. I moved the bed and the problem went away!

 

[clownfish chris]

On a side note, did you know you can use an iPhone as a EMF detector? It actually works very well!

 

[H2O]

Thanks I heard about the i phone emf app didn't bother looking into it just wanted to see what's going on in my house because now I got a 4 month old girl that likes to stare at the fish

 

[Brew12]

So I got a new EMF meter that measures magnetic field .
Electric transformers generate some emf , microwave,and smart electric meters ,cell phone when it rings all generate emf the epa has a recommended exposure limit of 0.5 to 2.5 emf, I checked my ecotech MP40S and the meter is reading higher EMF then a cellphone tower and microwave put together when mp40 are all the way up full speed the EMF is at 14.39
I'm not sure what to do dump them or keep them ? What's your 2 cent on EMF ?

I would recommend dumping them.... the EMF meter that is.

If I am reading your meter correctly, that is 15.41 micro Tesla's. That would equate to 154 mille Gauss. Unless you are planning on avoiding almost every electrical component out there, the added emf from something like your MP40's is almost negligible. Not saying you should strap them to your head, but it's not too bad in the big picture.

 

[Brew12]

Thanks I heard about the i phone emf app didn't bother looking into it just wanted to see what's going on in my house because now I got a 4 month old girl that likes to stare at the fish

Ah, now I understand your concern! I think it's great you are looking into it! On seeing this I dug into it a little more. Your gauss levels from your MP40's aren't actually that high (not that they show very high to begin with). The meter you selected has 2 issues. The first that it only reads between 30hz and 300hz, the second being that it is not a True RMS meter.

Without diving into the theory too much, your MP40's are DC motors. That is only half true. While they are brushless DC motors, that makes the almost identical to synchronous AC motors so to work the controller generates a stepped DC pulse output of varying frequencies. Your EMF meter is trying to read this pulse which is much closer to a square wave and assign a mico Tesla reading to it as if it were a sine wave. This, along with higher frequency harmonics caused by the electronic switching in the controller, is going to give you an artificially high reading.

Probably more than you were looking for but I hope that helps. If you want me to go further I can......

 

[H2O]

Here's what I get with different settings

 

[Brew12]

Here's what I get with different settings

Yup, that is ballpark what I expected. The 2nd picture is a bit higher at 211 milleGauss.

But again, your EMF meter is only going to give you a valid reading on AC sources that operate between 30hz and 300hz. It will not be accurate on the MP40 since it uses a stepped DC. With a higher quality meter I'm guessing you would see a much lower value.

Of course, if you are really worried about it, you could cover them with aluminum foil!

 

[azbigjohn]

Without diving into the theory too much, your MP40's are DC motors. That is only half true. While they are brushless DC motors, that makes the almost identical to synchronous AC motors so to work the controller generates a stepped DC pulse output of varying frequencies. Your EMF meter is trying to read this pulse which is much closer to a square wave and assign a mico Tesla reading to it as if it were a sine wave. This, along with higher frequency harmonics caused by the electronic switching in the controller, is going to give you an artificially high reading.

Probably more than you were looking for but I hope that helps. If you want me to go further I can......

Glad you held off on the theory... That answer alone has my head hurting!

 

[Brew12]

Glad you held off on the theory... That answer alone has my head hurting!

Sorry.. I'm a nerd. I can't help it.

Maybe a more simple analogy. Using this EMF meter to read a DC pump is like using a wooden ruler to read a curve. You will get a reading but it wont be accurate.

 

[H2O]

Thanks for the help ,so a running microwave only had 2.1 Mico tesla and the mp40 was at 21.1 Mico tesla . That's why I didn't know what was happening.

 

[Brew12]

Thanks for the help ,so a running microwave only had 2.1 Mico tesla and the mp40 was at 21.1 Mico tesla . That's why I didn't know what was happening.

No problem, and that is either a very new microwave or a very well built one!

 

[H2O]

Lol yes it is new I don't have one in the house so i checked one in the brand new condominium my boss has for sale . Thanks again

 

[H2O]

Sorry.. I'm a nerd. I can't help it.

Maybe a more simple analogy. Using this EMF meter to read a DC pump is like using a wooden ruler to read a curve. You will get a reading but it wont be accurate.

Sorry Brew12 but how do you check the curve ,I'm in the flat earth society a couple weeks now and they call the curve the sea level

 

[H2O]

Mini globe and Mini Sea level