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Sound Calibrators

Product Code: NORCAL

Smart sound calibrators with self compensation for temperature, humidity and barometric pressure.

Our selection of sound calibrators share a common working principle. The difference between them lies solely in their accuracy.

Nor1251 General Purpose Class 1 Calibrator

A class 1 calibrator with an output of 114dB @ 1kHz. The calibrator accepts full-inch cartridges as standard and 1/2-inch cartridges by means of the included Nor-1443 adapter. An option adapter (Nor-1444) available separately, allows the calibrator to accept 1/4-inch cartridges.

Nor1252 General Purpose Class 1 Calibrator

A class 2 calibrator aimed at less critical applications. The calibrator accepts 1/2-inch cartridges (not suitable for full-inch cartridges). An option adapter (Nor-1445) available separately, allows the calibrator to accept 1/4-inch cartridges.

Nor1253 General Purpose Class 1 Calibrator

A class L (Laboratory Standard - previous class "0") calibrator. The Nor-1253 is often referred to as the "electronic pistonphone" since it maintains an accuracy normally associated with a pistonphone without the need for a barometer to make corrections for variations in the ambient pressure. The standard class L/class0 Nor-1253 comes in two versions (250Hz or 1000Hz) producing 124dB SPL re. 20uPa. However, special versions are available. These will be of Class 1 accuracy. The output signal level is then factory preset to any level within the range 114-124dB and the frequency may be factory preset to any frequency within the range 125-1000Hz. None of these settings are user-adjustable.

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