![Ampetronic CMR3 Calibrated Induction Loop Measuring Receiver](http://www.ihear.co.uk/cdn/shop/products/CMR3_grande.jpg?v=1469881215)
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.