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Sound Level Calibrator “Castle” Model GA607



GA601: Single Level Calibrator

[IEC 60942:2003 Class 2/C]

Most Measurement codes of practice and good practice demand that an independent

acoustic calibration of any sound level meter should be made before and after a series of

measurements and the Castle GA601 provides just that facility. It produces a calibration tone

of 1000Hz at a level of 94dB re 20µPa at the microphone. It is supplied with a ½” cavity.


GA607: Dual Level Calibrator

[IEC 60942:2003 Class 1/C]

Similar to the GA600 in design, 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 ½” 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 [see spec. below]



General: Nominal Sound Pressure level at 101.3kPa [760mm Hg], 23° & 50%RH, Tolerance: +/-0.3dB, Harmonic

Distortion: <3%, Temperature range: -10°C to 50°C. Batteries: 2 x 3V CR2032 [Coin Cell] Life: approx. 70 hours.

Cavity diameter: ½” microphone standard. Dimensions: Length: 140mm, Diameter: 51mm, Weight: 230gms


GA601: 94dB relative to 20µPa

              Built to the requirements of IEC60942:2003 Sound Calibrators, Class 2/C.


GA607: 94dB or 104dB relative to 20µPa

              Built to the requirements of IEC60942:2003 Sound Calibrators, Class 1/C.


This product was added to our catalog on Friday 03 May, 2019.
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Nanomachinery Co., Ltd.
4, Soi Petchkasem 100 ,Phetchkasem Rd. ,Bangkaenue ,Bangkae ,Bangkok, 10160, THAILAND.
Tel : 086-322-6876 ,02-421-9927 ,Fax : 02-809-2591 E-mail : pongthorn@nano-machinery.com
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