dBCal Class 2 Triple Level Acoustic Calibrator

Castle Group
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The Castle GA612 is an Acoustic Calibrator from our new dBCal range provides 3 output levels to ensure acoustic ‘field’ calibration of your sound level meter is accurate both before and after measurements. With an excellent ‘line-of-sight’ surface the controls and display make use as easy and simple as possible. 

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Brand Castle Group
Available Outside the UK? Yes

Most Measurement codes of practice and legislative guides demand that an acoustic ‘field’ calibration of any sound level meter should be made before a series of measurements and that the accuracy is checked afterwards. The Castle dBCal Calibrators provide just that with 3 output levels, long battery-life and highly ergonomic design. Considerable care has gone into making sure that this is the only sound calibrator has its controls and displays on the same ‘line-of-sight’ surface as the sound meter.


IEC 60942:2017,BS EN IEC 60942:2018 and ANSI S1.40 2006 compliant

3 output levels, 94db, 104db & 114db, each at 1KHz - this allows greater options for testing sound meters

‘Line-of-Sight’ Eegonomics - all controls & displays on the same surface as sound meter

Simple operation — Turn on and go!

Ultra-low distortion & stability

MEMS microphone feedback - for atmospheric pressure compensation

Compliant with 2018 standard

User-upgradable software for future-proofing

GA611 - Class 1GA612 - Class 2
Tolerance ± 0.25dB ± 0.4dB
Harmonic Distortion < 1.6% < 3%
Temperature range -10°C to 50°C 0°C to 40°C
Relative Humidity 25% to 90% 25% to 90%
Atmospheric Pressure Range 65 kPa to 108 kPa 65 kPa to 108 kPa
Nominal Conditions 101.3kPa (760mm Hg), 23°C & 50%RH
Batteries 2 x 1.5V AA Alkaline
Battery Life approx. 70 hours continuous
Auto Power-off 1 minute (unless ‘wireless’calibration started)
Cavity diameter ½” microphone standard
Output Levels (rel. to 20μPa) 94dB, 104dB & 114dB
Standards IEC 60942:2017, BS EN IEC 60942:2018, ANSI S1.40 2006

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