- Industrial Hygiene
- Environmental
- Analytical Laboratory
- Disc Filter Membrane
- Glass Fiber
- Silver Filter Membrane
- Ceramic Filter Membrane
- Aluminum Oxide Filter Membrane
- Mixed Cellulose Ester (MCE) Filter Membrane
- Nylon Filter Membrane
- Polytetrafluorothylene (PTFE) Filter Membrane
- Cellulose Acetate (CA) Filter Membrane
- Hydrophilic Polycarbonate (PCTE) Filter Membrane
- Hydrophobic Polycarbonate (PCTE) Filter Membranes
- PVDF Filter Membrane
- Polypropylene (PP) Filter Membrane
- Polyethersulfone (PES) Filter Membrane
- Polyacrylonitrile (PAN) Filter Membrane
- Hydrophilic, Polyester Track Etch (PETE) Filter Membrane
- Hydrophobic Polyester (PETE) Filter Membrane
- Polyether Ether Ketone (PEEK) Filter Membrane
- Regenerated Cellulose (RC) Filter Membrane
- Quantitative Filter Paper
- Qualitative Filter Paper
- Syringe Filter
- In-line Filter
- Botanical Filter Paper
- Microbiology
- Others
- Disc Filter Membrane
Inter Products Marketing Sdn Bhd
Klang, Selangor, Malaysia.
+6016-305 9138
Sonus GA257B Industrial Dosemeter, Class 2
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Castle / GA257B
Sonus GA257B Industrial Dosemeter, Class 2
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)
Zpeak
% 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 |
| 4dB | |
| 5 dB | |
| Criterion Level | 75dB |
| 80dB | |
| 85dB | |
| 90dB | |
| Threshold Level | -5dB |
| -10dB | |
| 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 | -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) |
EMC:
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