Milesight LoRaWAN® Sound Level Sensor WS302-915M

Category	Specification	Details
Wireless Transmission	Technology	LoRaWAN®
	Frequency	CN470 / IN865 / RU864 / EU868 / US915 / AU915 / KR920 / AS923-1&2&3&4
	Tx Power	16 dBm (868 MHz) / 22 dBm (915 MHz) / 19 dBm (470 MHz)
	Sensitivity	-137 dBm @300bps
	Mode	OTAA / ABP Class A
Measurements	Range	30 dBA to 120 dBA, 35 dBC to 120 dBC
	Accuracy	± 3 dB (0°C to +45°C)
	Resolution	0.1 dB
	Frequency Range	30 Hz to 8 kHz
	Frequency Weighting	A and C Weighting (Switchable via Software)
	Time Weighting	Fast Weighting
	Measurement Unit	SPL Actual, Leq, Lmax
Device Features	Configuration	NFC
	Button	1 × Power/Reset Button
	LED	1 × Status/Alarm Indicator
Physical Characteristics	Power Supply	2 × 2700 mAh ER14505 Li-SOCl2 Replaceable Batteries
	Operating Temperature	-20°C to +60°C
	Relative Humidity	≤95% (Non-condensing)
	Ingress Protection	IP30
	Dimensions	68 × 65 × 20.5 mm (2.68 × 2.56 × 0.81 in)
	Material & Color	PC + ABS, White
	Installation	Flat surfaces using screws or 3M tape

Characteristics

LoRa WS302 Sound Level Sensor
This sound level sensor is ideal for smart buildings, smart cities, schools, and health monitoring applications.
It helps optimize the control and management of environmental noise levels.
The Milesight WS302 provides an efficient solution to monitor acoustic environments and improve people’s well-being.

Designed to precisely control noise
The WS302 offers a measurement range of 30 to 120 dBA, an accuracy of ±3 dB, and a resolution of 0.1 dB.
It supports A-weighted, C-weighted, and fast-time weighted measurements.
Available measurement units include Actual SPL, Leq, and Lmax, providing comprehensive acoustic monitoring.

Adjust weights A and C as needed

The Milesight WS302 sensor allows you to choose between A-weighting and C-weighting depending on your monitoring needs.
A-weighting is suitable for quieter environments, while C-weighting is used for louder environments.
This flexibility ensures accurate noise measurements in different situations.

Fast Time Weighting

Fast time weighting uses a 125-millisecond time constant to measure unstable noise with rapid fluctuations.
This feature captures quick changes in sound levels, providing more representative measurements in dynamic environments.
To conserve battery life, this feature is disabled by default.

More Sound Levels for Better Understanding

The WS302 supports reporting three sound level values: Peak Sound Level, Sound Pressure Level (SPL), and Equivalent Continuous Sound Level (Leq).
These measurements provide a complete understanding of the acoustic environment and help with better analysis and decision-making.

Its compact design allows the sensor to blend seamlessly into indoor environments.
The device operates within a temperature range of -20°C to +60°C and humidity up to 95%.
With an IP30 rating, it is designed for indoor applications.

Application Suggestions

An immediate application is in libraries where maintaining quiet environments is important.

In hospitals, it helps maintain a quiet environment for patient recovery and can also act as a noise alarm when necessary.

In schools, it supports a better learning atmosphere by monitoring classroom noise levels.

In hotels and offices, it helps ensure compliance with noise policies and improves employee productivity by maintaining a balanced acoustic environment.

LoRaWAN® Connectivity

The Milesight WS302 Sound Level Sensor is compatible with standard LoRaWAN® gateways.
It offers communication ranges of up to 15 km in rural areas and 2 km in urban environments.
This ensures reliable long-distance communication and scalable deployment for smart cities, buildings, schools, and healthcare facilities.