These products have been retired and are no longer available for purchase. See the 3M AcoustiCAL AC-300 sound calibrator for a suitable replacement.
3M Quest portable self-contained calibrators generate stable acoustic signals at a controlled frequency and amplitude to provide quick, precise calibration to verify the accuracy of your sound level meter in the field.
The QC-10 is a single frequency calibrator that generates a constant sound pressure level of 114 dB at a fixed frequency of 1000 Hz. The QC-20 is a dual-frequency, dual-amplitude calibrator. It generates four selectable reference tones: frequencies of 250 and 1000 Hz, each at levels of 94 and 114 dB. The QC-20 is recommended for use with precision ANSI and IEC Type 1 meters. Both models have a standard 1" coupler opening that may be reduced via snap-in adapters.
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