Industrial Noise Sensor, TTL/RS485/IIC/0-3V

High precision industrial noise sensors for sale are designed to operate normally at -20°C to 60°C and 0 to 90%RH without condensation, adapting to a variety of harsh industrial environments. Its 500ms fast response mode and 1.5 seconds slow response mode provide flexible measurement options for scenarios requiring fast response or long-term monitoring. Built-in reference calibration points of 94dB and 114dB ensure high accuracy at 1kHz with an accuracy error of only ±0.5dB.

Specification

Model	ATO-VMS-ZS-BZ
Working Voltage	4.5~5.5V (5V) (default)
	10~28V (12V) (optional)
Power Consumption	18.9mA@5V
	31.0mA@12V
	27.8mA@24V
Output Signal	UART（TTL）	Output voltage: 0~3.3V/ Input voltage: 0~3.3V Compatible 5V
	RS-485	ModBus-RTU communication protocol
	Analog output	Output voltage: 0~3V corresponding to 30~130dB
UART or RS-485 Communication Parameters	9600  N  8  1
Measuring Range	30dB~130dB
Frequency Weighting	A-weighting
Frequency Response Range	20Hz~12.5kHz
Transmitter Circuit Operating Temperature	-20℃~+60℃，0%RH~90%RH (no condensation)
Response Time	Fast mode	500ms
	Slow mode	1.5s
Stability	Less than 2% of cycle time
Reference Calibration Point	94dB and 114dB calibration, reference sound pressure 20uPa, frequency 1kHz
Noise Accuracy	±0.5dB (at reference pitch, 94dB@1kHz)
Dust Cover Impact	Effect ≤0.5dB in the range of 50~115dB
	Influence ≤0.7dB in other ranges within the measurement range
Working Environment	Air temperature: -20~+60℃
	Static pressure: 65kPa~106kPa
	No strong mechanical vibration, impact, strong electromagnetic field and corrosive gas in the surrounding area.
Adjustment Data for Sound Pressure Response and Free Field Response	The equivalent free-field response can be obtained by adjusting the data in the following table through the sound pressure response generated by an acoustic calibrator or the simulated sound pressure response generated by an electrostatic exciter.
Module Directivity at 1kHz, 2kHz, 4kHz, 8kHz
Electret Parameters
Free-field sensitivity	Approx. 8mV/Pa (free-field sensitivity level of -42dB, using 1V as reference)
Electret Head Capacitance	Approx. 15pF
Typical Frequency Response

Features

1. PCB board mounting method.
2. 30~130dB wide range, 20~12.5kHz wide frequency measurement.
3. Adopt high performance prepolarized back-pole electret condenser microphone, wide dynamic range and stable performance.
4. Output interface TTL/RS485/0-3V/IIC optional.
5. With two modes of slow and fast measurement to meet different customer requirements.
6. Power supply 4.5V~5.5VDC, 10~28VDC optional.

Dimension (unit: mm)

Installation Notes

Application

Tips: How do industrial noise sensors work?

Industrial noise sensors detect sound fluctuations in the environment by means of a built-in, high-precision microphone, which measures the noise using a specific frequency weighting (e.g. A-weighting or C-weighting). The sensor converts the noise signal into an electrical signal that is displayed or recorded on a monitoring device. These sensors are commonly used in industrial locations to monitor noise, ensure compliance with regulations and prevent long-term exposure to noisy environments.