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Noise Calibrator / Sound Calibrator

Model No : GA607

The GA607 meets the demanding standards of a class 1 calibrator. It features two calibration levels, 94dB and 104dB re 20μPa both at 1kHz. It is for use with 1/2" microphones. Using the GA607, a sound level meter can be checked at two meter scale points and usually on two ranges. Supplied with GA690 barometer


• Dual Level - 94dB & 104dB relative to 20μPa
• Built to the requirements of IEC60942:2003 Sound Calibrators
• Class 1/C.
• It is supplied with a ½" cavity.

Product Specifications

• Nominal Sound Pressure level at 101.3kPa (760mm Hg), 23º & 50%RH.
• Tolerance: ± 0.3dB.
• Harmonic Distortion: < 3% .
• Temperature range: -10°C to 50ºC.
• Batteries: 2 x3V CR2032 (Coin Cell).
• Life: approx. 70 hours.
• Cavity diameter: ½" microphone Standard
• Dimensions: Length: 140mm, Diameter: 51mm, Weight: 230gms.

GA690 Barometer

IEC 60942 states that for a calibrator to be used in the Class 1 category, it must be corrected for barometric pressure. The Castle GA690 barometer is supplied with the GA607 Class 1/C calibrator for just this purpose. With a simple readout on the clear display and a correction table printed on the reverse, this is a simple process.

GA690 Specifications

Frequency Range 0 to 1300mbar (0 to 975mmHg)
Resolution 1mbar, 1mmHg
Accuracy ±0.25% FS hysteresis and linearity
Battery 9V Alkaline type 6LR61 (PP3)
Battery life Greater than 2500 hours
Dimensions 106 x 67 x 30mm (LxWxH)
Weight 135g incl. battery