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The new model Acoustimeter AM11 is a high-quality, broadband meter for measuring radiofrequency (wireless) from mobile and cordless phones, telecommunications transmitters, modems, baby monitors, microwave ovens, smart meters, tablets and other wireless devices.

It now measures up to 10 V/m and 250,000 µW/m2.

The AM11 detects signals in the frequencies used by most communications systems (200MHz to 8GHz). This covers the 600 – 900 MHz, 2.6 GHz and 3.5 GHz 5G / LTE bands. It measures both peak and average exposures.

It has a very fast response time, taking measurements thousands of times per second.

It measures the total wireless exposure in any location. It can be used to identify ‘hot spots’ to be avoided or shielded and ‘safe’ zones for beds or workstations.

The instrument is suitable for those with severe electrosensitivity as it is sensitive down to 0.02 V/m.

Does the Acoustimeter AM11 measure 5G radiation?

The Acoustimeter AM11 measures from 200 MHz to 8 GHz, including the 3.5 and 3.6 GHz band currently being rolled out for 5G. This model has been optimised to measure radiation in the 5G range more effectively.

In the future, some 5G networks will operate at higher frequencies, such as 25-28 GHz. We will have an additional meter for measuring these high fields, but it will not replace the Acoustimeter, as both meters will be needed.

Support material

The Acoustimeter comes with a booklet unique to EMR Australia which explains, in simple terms, what you need to know about measuring radio frequency radiation. It contains easy-to-understand instructions, including:

  • detailed directions about how, when and where to measure for optimum results
  • charts for easy recording of your fields
  • handy safety tips
  • information about ‘safe’ levels of exposure
  • instructions for reducing exposure from common sources.


  • measurements in units of Volts per metre on LCD display
  • measurements in units of microwatts per metre squared on LCD display
  • audio function with volume control
  • coloured LED lights for safety guidance
  • peak reading display
  • durable, vinyl carry bag
  • user manual
  • information booklet with charts and safety information
  • internal antenna for ease of use
  • 5-year return-to-base warranty 

 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): 0.01 V/m – 10.00 V/m
  • Sensitivity (Average Display): 0.1 µW/m2 – 250 000 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 1,02 x 33 (LxWxD)
  • Weight: 280g, excluding batteries

Download the Acoustimeter Manual here >>  


A very quiet “hissing” noise may be heard when no LEDs are illuminated and this results from the internal workings of the Acoustimeter and is of no concern.

Acoustimeter AM11 and other wireless meters

The Acoustimeter AM11 reads differently from some meters as:

  1. It has a very fast response (up to over 8 GHz and reacts to very short pulses).
  1. Peak readings are the highest sampled reading and include very short pulses such as those from WiFi. The OLED peak-hold is the highest measured since “last cleared”. It is cleared by switching the meter off and on again, or by pressing the “CLEAR (PEAK)” button.  The peak-hold reading can be higher for some types of signal than the highest LED seen flashing as the Peak LED display does not show all the pulses so as to make it easier to see.
  1. The Average reading is a true mathematical time-averaged rolling average of thousands of samples, updated 3 times each second. This gives the correct reading for DECT and WiFi and is much lower (DECT average power is about 0.01 of the DECT pulse power) than many other instruments which use the highest peak reading and then translate that into an equivalent average power. That is not correct as power is measured as total energy used/delivered per second and not the energy in a short pulse of say 10 milliseconds followed by a 990 ms gap. It is important that we understand this as most international standards are based on true average power (actually usually averaged over 6 minutes!). N.B. The internal antenna is at the top rear of the case. Signals are best measured when the source is behind the instrument, but also quite good with the source to one or other side (particularly the left side away from the switches and volume control). It under-reads if the source is in front of the meter as the OLED display acts as an RF screen.

Customer feedback

'Back in 2016 my partner and I bought an Acoustimeter from you which changed our lives by demonstrating exactly what our bodies had been warning us about.' By F.B.