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ProLoop FSM+ Loop Field Strength Meter

Order Code: 230-211

£112.99 ex. VAT

£135.59 inc. VAT

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This product carried a warranty for 2 years

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2 Year Warranty

If you have a pacemaker or ICD fitted you should read your user manual along with the FAQ's on our website before using this product. If in doubt consult your cardiologist. Click for more information.

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This product is suitable for users with hearing aids that have the 'T' or loop facility.

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The PROLOOP FSM Plus accurately measures the magnetic field strength of induction loop systems, according to IEC 60118-4:2006 and BS 6083:4.

Designed for professional use, PROLOOP FSM Plus delivers reliable RMS values on the output level, response frequency, Automatic Gain Control (AGC) function, distortion and background noise in the tested induction loop.

In addition, it enables the user to make an acoustic evaluation of the sound via earphones


  • Conforms to IEC 60118-4: 2006 standard
  • Adjustment possibilities for two test ranges:
    • background noise
    • field strength
  • RMS-measuring range calibrated to 400mA/m = 0dB
  • Handy, light-weight, rugged chassis
  • Switchable A weighted filter

Technical Information

True RMS:125 ms average time
Measuring range:+6 dB -40 dB (0 dB = 400mA/m)
Power supply:2x 1.5V AA batteries
Display:LED Battery status control
Field strength:LED-Scale (1dB resolution)
Output:3.5 mm stereo headphone jack with volume control
Dimensions:3.3" x 5" x 1.4" (83 x 126 x 35 mm)
Weight:6.0 oz. (170 g) (incl. batteries)

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