Contact us

CALL: 01371 871030

Norsonic 139 Sound Level Meter

Product Code: Nor139

Class 1 Sound Level meter designed for advanced noise assessments and noise logging, featuring event triggered sound recording and markers.

A simple to use class 1 Sound Analyser with advanced features from Norsonic.

May optionally be fitted with 1/1- and 1/3-octave filters with multispectra down to 100ms time resolution. The SD-card makes it easy to store and import measurement data to a PC.

  • Value engineered to give a full system for noise nuisance investigations
  • Investigations at reduced cost
  • Full fidelity audio uncompressed audio recordings
  • 99 second pre trigger on audio recordings
  • SD memory card for fast transfer of data to a PC
  • Tough case inside rucksack for discreet deployment of equipment


  • Precision integrating sound level meter to IEC 61672 class 1
  • Handheld real-time 1/1-octave or 1/3-octave frequency analyser (6,3Hz-20kHz)
  • Measurement of A-weighted levels simultaneously with either C- or Z-weighted levels
  • Parallel detection of SPL, Leq, Lmin, Lmax, LE and Lpeak
  • 120 dB dynamic range giving a “one-range” instrument
  • Measures Lpeak levels up to 140 dB
  • Parallel detection of F, S and I time constants
  • USB 2.0 and High-speed RS-232 serial interface
  • SD memory card and large high speed internal memory
  • Sound recording in 8, 16 or 24 bit format with 12 or 48 kHz sampling
  • Up to 90 sec. audio recording pretrigger
  • High-resolution graphical backlit display
  • Manual or automatic storage of results
  • Automatically repeated measurements with clock synchronization
  • Pause/Continue function with back erase feature
  • Results displayed as dB or linear values
  • Numerical printouts
  • AC output signal
  • Windscreen correction
  • Support for IEPE sensors
  • NC, NR and RC rating
  • Multiple language selection
  • Moving Leq

Call 01371 871030 to buy

I would like to receive information about the following products (please tick)

Sign up here

For our news and special offers