PCE-SC 42 is a class 2 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.

- Frequency: 1 kHz / ± 0.1 %
- Sound pressure levels: 94 dB and 114 dB
- Accuracy: ± 0.3 dB (at 20 °C / 68 °F and 760 mm Hg / 101325 Pa)
- Hole opening is 12 mm for sound meter microphone