Extech Instruments Sound Level Alert W/Nist Sl130W SL130W-NIST. Continuously monitor sound levels throughout the day using the Extech SL130W Sound Level Alert. Bright LEDs (red flashing or green) alert user when sound level is too high or too low -...
Extech Instruments Sound Level Alert W/Nist Sl130W SL130W-NIST. Continuously monitor sound levels throughout the day using the Extech SL130W Sound Level Alert. Bright LEDs (red flashing or green) alert user when sound level is too high or too low -...
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