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5 Pack Sonus GA257B Industrial Dosemeter Kit, Class 2

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5 Pack Sonus GA257B Industrial Dosemeter Kit, Class 2 Noise Personal Noise Meter / Noise Dosimeter Industrial Hygiene

Castle / NK003

5 Pack Sonus GA257B Industrial Dosemeter Kit, Class 2

5 units of Sonus GA257B (Class 2) Industrial Dosemeter c/w Calibrator (Single level, Class 2) and Dosemeter Kit Case

The SONUS Pocket Dosemeters are designed to be powerful and easy to use. These dosemeters are small and tough so measurements and data can be collected throughout the working period (Data can only be reviewed onscreen).  The SONUS GA257B is a dedicated basic dosemeter fully compliant with IEC 61252:1993 and IEC 61672-1:2013, giving simultaneous sound exposure (Lep'd) and maximum peak (Zpeak) measurements, an essential feature for Noise at Work Regulations assessments. The GA257 Noise Dosemeters are easy to use and have a clear display allowing data to be read on screen. The keypad can be locked to prevent any measurements being accidentally stopped or altered. The data is stored on flash memory at user selected intervals. The built in software for this meter is designed to suit future upgrading for feature enhancements, legislative changes or instrument upgrades. With the Castle SONUS Dosemeters you will always be in step with the law.

Parameters Measured

User selectable Exchange Rate (3dB, 4dB or 5dB)
User selectable Criterion Level (75dB, 80dB, 85dB or 90dB)
User selectable Threshold Level (-5dB, -10dB or OFF)
% Dose
Lep'd (Lex)
% DOHR (Dose/Hour)
Pa2h (Lep'd expressed in Pascals)
Exposure Time
Lockable Keypad
Constructed from tough crack resistance plastic

Technical Specification

Standards IEC61672-1-2002 (Sound Level Meters)
IEC61252-1993 (Personal Sound Exposure Meters)
IEC 61672-1:2013
Linear Operating Range 70dB
Detector Characteristics RMS and Peak
Exchange Rate 3dB
5 dB
Criterion Level 75dB
Threshold Level -5dB
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 -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)
Weight 220g (including battery)

Emissions: EC 61000-6-3, EN61326-1:2006, CISPR 22:1997 EN55022:1998, FCC Rules, Part 15 2003 Class B
Immunity: IEC 61000-6-2:2005, EN61326-1:2005 Levels ±4kV (Contact), ±8kV (Air)
Amp Mod: IEC 61000-6-2:2005, Level 10V/m
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