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Acoustimeter AM11 EMF RF Detector


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The AM11 Acoustimeter is an asy to use and incredibly powerful radiofrequency (RF) / microwave detector. It measures both peak and average signals using a combination of LEDs and number readings on a bright text screen. The AM11 detects almost all modern wireless technology, including mobile phones, cordless phones, smart meters, and Wi-Fi. This meter with a sleek design is suitable for those with severe electrosensitivity as it is sensitive down to 0.02 V/m. It also has an audio output that helps determine the source of the exposure.

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Presenting radio frequency (RF) measurements as an audio signal, the Acoustimeter AM11 EMF RF Detector will measure both peak and average readings at the same time. Covering all frequencies from TETRA to WiMax and Wi-Fi. It accurately measures all incoming radiation from 200 MHz to 8000 MHz (8 GHz) and was designed using many years of real-life measurement experience.

Expertly designed so that you can see the levels of microwave signals, you will be able to determine the safety of the environment around you. No matter what the level of microwave radiation, the Acoustimeter will pick it up – whether it’s below 0.02 V/m or it seems as though there is no modulated radiation. Covering the frequencies produced by most communication systems, it’s a piece of kit that you won’t want to miss out on. 

The text display offers high accuracy with a lower update speed, giving you time to take note of the readings.

When it detects RF or microwave radiation, the readings will show on the OLED text display and will light the LEDs up. Updating according to the levels in the room, the EMF meter will allow you to find different hot spots in the area. It is an easy and user-friendly EMF meter which text display offers high accuracy with a lower update speed, giving you time to take note of the readings.

For extra convenience, it also has a speaker alongside an audio output socket that you can insert headphones in, which will give you an idea as to which devices are giving out the microwave radiation. After some practice, you will become more familiar as to which devices have a higher reading than others – however, it’s important to remember that if there are several devices that give off RF, the sound might be harder to identify.

What are peak readings?

The peak readings are what they say on the tin – they are the highest possible reading. Accurately and efficiently reacting to shorter pulses that are frequently transmitting (e.g from WiFi), the emf meter is ideal for those in any industry. It’s important to know, however, that the meter won’t react to every pulse – in particular, those that emit for under 5 microseconds. 

The peak-hold reading can be seen on the LCD screen. This can be higher for particular sources, but because the peak LED display doesn’t show all pulses, it can be difficult to detect. If you want to try and detect the peak-hold, you can simply turn the device on and off again and the previous reading will clear.

What are average readings?

The average reading will calculate the average amount of RF levels by updating 4 times each second. Giving you a more accurate result, it will consider RF levels that are far lower than other sources (I.e WiFI and DECT – which has an average power of 0.01). Translating the highest peak reading into true average power, you will be able to measure the levels far more efficiently than when you use an outdated emf meter.

Technical specifications

  • Two line OLED displaying actual levels:

— Peak exposure levels in V/m

— Peak hold levels in V/m

— Average exposure levels in µW/m2

  • Two lines of fast LEDS displaying showing:

— Peak exposure levels in V/m

— Average exposure levels in µW/m2

  • Measurement range: 200 – 8 000 MHz ±6 dB ±0.02 V/m
  • Sensitivity (Peak Display): 0.02 V/m – 6.00 V/m
  • Sensitivity (Average Display): 1 µW/m2 – 100 000 µW/m2
  • Pulsing signal may be heard through the internal speaker
  • Power source: 2x AA Alkaline or Rechargeable (1.2 – 1.5V)
  • Power draw: 100-150 mA at 3V
  • Battery life: 20 hours

— Typically 15 hours on two new 1500 mAhr AA alkaline cells and

— Typically 25 hours on two charged 2700 mAhr NIMH rechargeable cells

  • Size (mm): 190 x 102 x 33 (LxWxD)
  • Weight: 280g, excluding batteries
All EMF detectors have a specific warranty against manufacturing defects and a return to base warranty depending on its manufacturer. As merchants, we are committed to total customer satisfaction and our free return policy is applicable only when the product arrives in a defective state. Otherwise, the customer shall pay return fees to receive a refund.


If you are a UK customer and suffer from Electrical Hypersensitivity (EHS), then you are eligible for full VAT relief on items for personal use such as Bed Canopies, Sleeping Bags & Bed Sheets. Click here for more details on disability under the Equality Act 2010.

Complete your order as normal and when you are ready to check out, select the Disability VAT Exemption option and fill in the form. The form will be saved in your customer profile and VAT will be automatically deducted in all your purchases. 

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