Operating on 10-30VDC with minimal 0.1W power consumption, it features a versatile 485 communication interface (ModBus-RTU protocol). Noise sensor, RS485, 4-20mA, 0-5V offers a resolution of 0.1dB, measuring noise from 30dB to 130dB across a frequency range of 20Hz to 12.5kHz.
Tips: Why is monitoring noise important?
ATO-NS-RS Long Pole Noise Sensor User Manual.pdf