SW-525A 30-130dB Digital Sound Level Meter with Large LCD Display Noise Meter
90,12 €
You need to restart the machine. If it is too large, it will burn the circuit board. If the device is turned on, the LCD display does not display, and the sensor may be faulty. Alarm switch setting: short press the "horn button" to turn off the alarm and the red light goes out, then press the "horn button" to turn on the alarm, and the red light is on.
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