Industrial Dosemeter, personal sound exposure meter

by Castle

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The SONUS GA257B is a dedicated basic dosemeter fully compliant with IEC 61252:1993, giving simultaneous sound exposure (Lep'd) and maximum peak (Zpeak) measurements, an essential feature for Noise at Work Regulations assessments.

Each GA257 SONUS Dosemeter is supplied in its own plastic case complete with a handbook, windshield and pen.


Standards: IEC61672-1-2002 (Sound Level Meters), IEC61252-1993 (Personal Sound Exposure Meters)

- Linear Operating range: 70dB
- Detector Characteristics: RMS and Peak
- Exchange rate: 3dB, 4dB or 5dB
- Criterion Level: 75dB, 80dB, 85dB or 90dB
- Threshold Level: -5dB, -10dB or OFF
- Peak: 3dB above top of selected range
- Display: Custom alphanumeric LCD, digit size 7mm x 5mm
- Memory: 4800 Data Intervals Maximum
- Calibration: 91.0 to 120.0dB @ 1KHz
- Batteries: 1 x PP3 (9V) Approximately 12 hours continuous use
- Operating Temperature: Operating Range: -10 to + 50ºC
- Humidity: Effect: < 0.5dB from 25% to 90% RH
- Vibration: No effect on instrument
- Processing: A to D Converter: 12-bit, 325kHz sampling. 8MHz, micro-controller
- Dimensions: 60mm (width) x 35mm (depth excluding pocket clip) x 135mm (height)
- Microphone cable length: 800mm (including rubber sleeve and microphone)

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