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 3. GQ EMF EF Meter RF Spectrum Power Analyzer
 Accuracy range RF compared to Safe & Sound Pro II
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Jo

16 Posts

Posted - 12/02/2022 :  11:38:32  Show Profile  Reply with Quote
Hello,

I thought the EMF-390 was accurate since I also own a Cornet 88 that shows similar values but then I bought a Safe and Sound Pro II, much more expensive but also much more sensitive. Most of time the RF values are doubled on the Safe and Sound and they are instantaneous (several measurements per second). How do you account for such discrepancies?

For instance 0.2v/m on EMF-390 vs 0.4v/m on S&S.

It’s frightening because I don’t know which one to trust.

What’s the accuracy range on the EMF-390? It’s 6dB on Safe and Sound.

Thanks,

Jo

Edited by - Jo on 12/02/2022 11:41:04
Reply #1

EmfDev

2193 Posts

Posted - 12/05/2022 :  10:50:46  Show Profile  Reply with Quote
Hi Jo, what is the range of the safe & sound pro II? Since 2 of the meters measure in similar range, it may be the S&S increased their readings to make it look more sensitive. You can also easily adjust the readings on EMF 390 by changing the RF gain in the settings.
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Reply #2

Jo

16 Posts

Posted - 12/05/2022 :  11:25:56  Show Profile  Reply with Quote
Hello, here is what I found on their website:

« This meter is a 3rd party certified RF detector with effective measurement range of 200 MHz to 8 GHz, true response detection range 400 MHz to 7.2 GHz (+/- 6dB). »

What does that mean? Is it similar to the EMF-390 and how can I efficiently compare both?

Thanks!

Jo
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Reply #3

EmfDev

2193 Posts

Posted - 12/05/2022 :  11:34:07  Show Profile  Reply with Quote
What about the max mW/m2 that it can measure? The EMF-390 is from 10MHz to 10GHz. You can just use some sources to check readings like wifi router or microwave. it will be hard to compare of course since RF is not constant. Unless you have a walkie-talkie (generates constant RF) or anything that can generate constant RF. And not pulsing.
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Reply #4

James B

6 Posts

Posted - 01/19/2023 :  06:20:30  Show Profile  Reply with Quote
quote:
Originally posted by Jo

Hello, here is what I found on their website:

« This meter is a 3rd party certified RF detector with effective measurement range of 200 MHz to 8 GHz, true response detection range 400 MHz to 7.2 GHz (+/- 6dB). »

What does that mean? Is it similar to the EMF-390 and how can I efficiently compare both?

Thanks!




Hello Jo

The +/- 6dB is the accuracy of the Safe and Sound. This gives you an error 0.25 times the true value to 4 times the true value for RF between 400 MHz and 7.2 GHz. For example, if the true RF was 100 mW/m2 the Safe and Sound would display a value between 25 mW/m2 and 400 mW/m2. Across it's entire RF range of 200 MHz to 8 GHz, the error would be larger, possibly +/-10dB or 0.1 times the true value to 10 times the true value.
The EMF 390 is specified from 10MHz to 10 GHz (+/-10dB). Here, for a true RF of 100 mW/m2, the EMF 390 would indicate 10 mW/m2 to 1000 mW/m2. For RF powers between 400 MHz and 7.2 MHz, the EMF 390 may be as accurate or more accurate than the Safe and Sound.

Reference: EMF 390V2 User Guide Revision 1.94

Hope this helps,
James B
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Reply #5

Linder Avalos

Peru
6 Posts

Posted - 01/17/2024 :  09:58:28  Show Profile  Reply with Quote
Segun la paginá 9PCI en sus comparativas colocan a GQ EMF-390 con un color rojo ni siquiera amarillo.
Indicando que no tiene precisión e incluso lo han denominado como solo juguete.
Podrías responder a esta afirmación.
Muestran tablas comparativas donde este equipo difiere a todos los démas del mercado.
Estoy interesado en saber si es confiable los intervalos de precisión de este equipo.
gracias. voy ha intentar pasarte los cuadros y tablas
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Reply #6

Linder Avalos

Peru
6 Posts

Posted - 01/17/2024 :  12:58:17  Show Profile  Reply with Quote




estos son los cuadros antes indicados

Ingeniero Civil
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Reply #7

EmfDev

2193 Posts

Posted - 01/17/2024 :  16:04:17  Show Profile  Reply with Quote
9CI is a bad competitor and fakes the data. You can find real testing here:
https://www.youtube.com/@5grfemf629/videos

Even TF2 Manufacturer had confirmed that EMF and EF readings are close with the EMF-390 and TF2.
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Reply #8

Linder Avalos

Peru
6 Posts

Posted - 01/18/2024 :  09:24:59  Show Profile  Reply with Quote
En amazon encuentro TRES productos básicamente DOS que se encuentra en almacenes de amazon desde el 2018 y UNO otro del 2021.
Existe diferencia entre ellos o porque es la diferencia de precio.
agradecería me indique la mejor versión.







Agradezco la información para compra. hay uno de ello que tiene cupon. en todo caso como puedo obtener un cupon de descuento

Ingeniero Civil
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Reply #9

Linder Avalos

Peru
6 Posts

Posted - 01/18/2024 :  10:06:24  Show Profile  Reply with Quote
O donde encontrar la mejor version

Ingeniero Civil
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Reply #10

EmfDev

2193 Posts

Posted - 01/18/2024 :  10:53:48  Show Profile  Reply with Quote
All of them are the same products. Just price is different, and maybe shipping speed. You can pick the one with a discount or coupon. Let us know if you have more questions.
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Reply #11

Linder Avalos

Peru
6 Posts

Posted - 01/21/2024 :  10:48:52  Show Profile  Reply with Quote
Buenas tardes ya compre un medidor por amazon. como me recomendastes opte por una oferta ya que todos son la misma version. te agradezco enlace de alguna comunidad, manuales o informacion que tengas para aprender a usarlo. Muy agradecido.

Ingeniero Civil
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Reply #12

EmfDev

2193 Posts

Posted - 01/22/2024 :  14:32:14  Show Profile  Reply with Quote
You can find the EMF-390 user guide here:
https://www.gqelectronicsllc.com/GQ-EMF-360V2-380V2-390-UserGuide.pdf
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