Ampetronic CMR3 Calibrated Induction Loop Measuring Receiver

(Exc VAT)

The CMR3 calibrated receiver is designed for measuring the performance of audio induction loop systems. The audio output is within ±0.25 dB over the frequency range and where used with a suitable audio analyser the frequency response and field distribution of the magnetic field from any audio induction loop system can be plotted.

Calibrated to provide 0dBu output for a field strength of 400mA/m RMS, in accordance with the international induction loop standard IEC60118-4 it is an essential tool for anyone wishing to assess loop system performance for analyses or certification.

The unit is powered by 2 off AA batteries supplied.


  • Easy assessment of the system to the international induction loop standard IEC60118-4
  • Accuracy to within 0.5dB
  • 5 year warranty
  • Compatible with most audio analysers

Applications include

  • Measure loop coverage and spill
  • Assess frequency dependent loss due to metal structures
  • Certification of an induction loop system to IEC60118-4


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