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Flashing red LED with audible tone when voltage is present
educational and calibration applications
Clear oversize luminous LEDs shine through voltage level
and where applicable where you would like it to be delivered once calibrated
Unlike conventional current transformers there is no maximum overload limitation
Martindale SPC70 Class 2 Sound Level Calibrator NPT Flashing red LED with audibleMartindale SPC70 Class 2 Sound Level Calibrator For verifying accuracy of sound level meters Simple to use 1kHz reference at 94dB and 114dB Compatible with a wide range of meters Complies with international standards Description The SPC70 is a Class 2 sound level calibrator suitable for periodic testing of sound level meters and verifying their accuracy before and after readings, in accordance with international standards. The SPC70 is simple to use
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