Extech 407744 Sound Level Calibrator – 94dB (Review)

Extech Calibrators accommodate Sound Level Meters with 0.5” and 1” microphones. The Calibrator’s die-cast aluminum housing is built for ruggedness and durability. The 407744 provides a 94dB calibration output signal while the 407766 provides both 94dB and 114dB outputs. This professional calibrator, with proper care, will provide years of safe reliable service.

Output signals

407744: 94dB [...]

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