01dB CAL31

Class 1 acoustic calibrator

Cal31 from 01dB brand is a class 1 acoustic calibrator for calibration and adjustment of any type of sound level meter equipped with a 1/2 ” diameter microphone. It is composed of an ergonomic and robust case. Easy to use, just press a button to start the signal. DUO, FUSION and CUBE products automatically detect the 93.7 dB signal at 1 kHz and initiate the calibration procedure.



Its specifications comply with IEC 60942: 2003 Class 1 and is approved in France by the Laboratoire National d’Essais (LNE) under number LNE-33867-0 and in Germany by Physikalisch-Technische Bundesanstalt (PTB) under number PTB-1.63-4087636.

Main Technical Specifications

  • IEC 60942:2003 Class 1 Performance
  • Sound pressure level 94 dB for pressure field microphone
  • Sound pressure level 93.7 dB for free field microphone
  • 1 kHz output frequency
  • Dimensions Ø48 x H135 mm
  • Weight 185g (with battery)
  • 9V battery
  • 15 hours battery lifetime continuous use
  • Automatic Switch off after 5 min


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