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Acoustic Calibrator - Class 1

Class 1 Calibrator
Class 1 Calibrator
Class 1 Calibrator Class 1 Calibrator Calibrating a Sound Meter

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Class 1 Calibrator, 94dB 1kHz, for ½" microphones
In stock

Calibrator adapter for ¼" microphone
In stock

The delivery price is calculated during checkout based on your location and the goods ordered. Our basic delivery prices are:

Delivery within USA: $40.00

Delivery Service: Five working days*

* For products that are in stock and the order received by midday.

Some products go through a final configuration and calibration before being shipped. If the calibration labs are busy this can add up to two days on to the delivery schedule but guarantees a fresh calibration.

Class 1 Calibrator, 94dB 1kHz, for ½" microphones
In stock


  • IEC 60942:2003 Class 1
  • ANSI S1.40:2006
  • Sound pressure level 94 dB
  • Frequency 1 kHz
  • Fits ½" microphones
  • Adapter available for ¼" microphones
  • 15 Year Warranty


  • Calibration check of Type 1 sound level meter
  • Field calibration checks
  • Calibration of environmental noise monitors
  • Required by many noise regulations


The CR515 Acoustic Calibrator meets ANSI S1.40:2006 and IEC 60942:2003 to Class 1, the more accurate grade. It is most suited to the Type 1 sound level meters and environmental noise monitors that NoiseMeters offers.

This calibrator is included in most of the Type 1 Noise Measurement Kits and Outdoor Noise Kits, along with the sound level meter, carrying case and software where applicable. Please refer to the sound level meter web pages for more information.

Using It

As soon as the calibrator is switched on it emits a 1 kHz tone at 94 dB. The calibrator should be pushed carefully (firmly, but slowly) on to the microphone capsule.

The meter should now be adjusted accordingly. There will often be a free-field adjustment to make for the microphone in use. So, for example, you may actually be adjusting to 93.8 dB on the meter. For meters provided by NoiseMeters this is either dealt with automatically by the meter, or is covered in the meter's User Manual.

StandardsIEC 60942:2003 Class 1
ANSI S1.40:2006
Type ApprovalPTB-1.61-4028829
CEM 140786001
Sound Level94.0 dB ± 0.2 dB
Frequency1 kHz ± 1%
Distortion< 2%
Reference conditions23°C, 101.3 kPa, 65% RH
Microphone size½" (to IEC 1094-4)
Calibration adapterQD7 for use with 1/4" microphone capsules
Battery type1 x 9v (PP3, 6LR61, 6F22)
Dimensions121 x Ø47 mm
Weight220 g with battery
ControlsPush button start, Automatic switch off with green
LED indication. User override of automatic switch off
CE classificationEN 61000-6-3:2007+A1:2011
EN 61000-6-1:2007