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Sound Level Meter Calibrator SC 42
SC 42 is an acoustic or sound calibrator used to calibrate sound level meters, microphones and noise measuring devices and equipment. Suitable for use with type 2 or class II SPL meters, this portable decibel (db) meter calibrator is easy to use in the field or the laboratory. 

Sound Level Meter Calibrator SC 42

    1. Frequency: 1 kHz / ± 0.1 %
    2. Sound pressure levels: 94 decibels (dB) and 114 dB
    3. Accuracy: ± 0.3 dB (at 20 °C / 68 °F and 760 mm Hg / 101325 Pa)
    4. Microphone: 1/2 " and 1 " microphone opening
    5. Standard: IEC 942 class 2
    6. Power supply: 1 x 9 V battery (block, NEDA 1604, Burgess 2U6 or similar)
    7. Battery life: Approx. 100 hours
    8. Environmental conditions: -10 ... +50 °C / +14 ... +122 °F
    9. Storage conditions: -40 ... +65 °C / -40 ... +149 °F (remove battery beforehand)
    10. Temperature coefficient: 0 ... 0.01 dB / °C
    11. Altitude effect: Reduction of approx. 0.1 dB per altitude gain from 2000 ft from the sea level up to 12000 ft or comparable changes of the atmospheric pressure (approx. at every decrease of 50 mm Hg)
    12. Dimensions: Approx. 48 x 48 x 138 mm / 1.89 x 1.89 x 5.43 "
    13. Weight: Approx. 250 g / 0.56 lb 
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