Nor1255 Class 1 calibrator,114 dB @1000 Hz

Nor1255 Class 1 calibrator,114 dB @1000 Hz

Norsonic is launching the worlds first class 1 calibrator  with twin frequencies and levels; 94dB/114dB – 250Hz/1000Hz.


Nor1255 is a small battery-operated precision class 1 microphone calibrator generating 114 dB @ 1k Hz conforming to IEC 60942 and ANSI S1.40.

The all-digital design with a quartz-controlled signal generator ensuring frequency stability not yet seen on any calibrator on the market today.

The reference microphone and accompanying control circuit maintain a constant sound pressure level inside the calibration coupler and automatically adjusts for changes in load volume, temperature, humidity, and barometric pressure. Each calibrator is supplied with an individual accredited calibration certificate.

Sound Calibrator Nor1255

General Sound calibrator class 1 according to EN/IEC 60942 Ed. 3 (2003) and ANSI/ASA S1.40-2006 (R2011).

Microphone size: 1/2” and below via adapters
Calibrator frequency ( @ Reference conditions): 1000 ±1.00 Hz
Generated Sound Pressure Level relative to 20µPa (@ Reference conditions): 114.0±0.2 dB
Distortion: Max 2.0 %
Stabilizing time: 20 seconds
Sensitivity to environmental conditions: As specified for IEC 60942 class 1 / ANSI S1.40.
An environmental range for specified operation:
Temperature: -10ºC to +50ºC / 14ºF to 122ºF
Relative humidity: 25 % to 90 %
Air pressure: 65 kPa to 108 kPa
Additional specifications for the built in ambient measurement sensors:
Power off: By power switch or when a microphone is removed (may be deactivated)
Battery type: 2 x LR03 alkaline batteries (AAA-size)
Battery life: > 10 hours
Battery low: Automatically switching off if battery voltage too low
Weight: 125 g / 0.28 lb
Size ( LxWxH ): 97 x 51.5 x 41 mm / 3.8 x 2.0 x 1.6“
Accessories included: (may vary if supplied as part of a sound level meter kit):
Accredited calibration, 2 x AAA batteries, instruction manual, and leather pouch Nor1345
Accessories available: 1/4” microphone adapter Nor4590

Nor1255 Datasheet


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