WS302 Sound Level Sensor

LoRaWAN® Sound Level Sensor


  • Accurate Sound Level Measurement
  • LED Alarm Indicator
  • 1.5~4 Years Battery Life
  • Easy Configuration (Via NFC)

Monitor Sound Level with Ease

WS302 is an advanced LoRaWAN® Sensor for monitoring noise/sound level in decibels (dB) with ease.

  • 30 to 120 dBA Measurement Range
  • ± 3 dB Accuracy; 0.1 dB Resolution
  • A-Weighting, C-Weighting & Fast-Time Weighting
  • Measurement Unit: SPL Actual, Leq, and Lmax

A & C Weighting as Needed

Choose A-weighting or C-weighting based on scenarios. Usually, A-weighting is appropriate for quiet environments while C-weighting is for noisy environments.


Fast-Time Weighting

Fast-time weighting uses a time constant of 125 milliseconds for measuring unstable noise with large fluctuations.

Fast weighting is turned off by default. When turned on, battery life will be shortened.



More Sound Levels for more Insight

Support reporting of three sound level values (maximum sound level, sound pressure level, and equivalent continuous sound level) based on different weighting methods.



Dainty as Always

Blend into any Interiors

Fight Against Uncomfortable Noise

Minimalistic and modern design makes it ideal for classrooms, workplaces, hotels, hospitals, etc. WS302 is an unnoticed guard for eliminating noise pollution.


LoRaWAN® Based

Milesight Sound Level Sensor is compatible with industry-standard LoRaWAN® gateways with a range of up to 15 km in rural areas and 2 km in urban areas.




Milesight IoT Cloud

Compatible with Milesight IoT Cloud and view sound level at your fingertips.





Easy Configuration

1st Step
Install the Milesihgt ToolBox
2nd Step
Enable NFC and run ToolBox,
then attach your phone to the device
3rd Step
Verify the password
and start configuring

Flexible Installation

Screw Mounting

Double Sided Tape Mounting



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
Measurement 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 (Software Switchable)
Time Weighting Fast Weighting
Measurement Unit SPL Actual, Leq, Lmax
Others 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
Dimension 68 × 65 × 20.5 mm (2.68 × 2.56 × 0.81 in)
Material & Color PC+ABS, White
Installation On the flat surfaces with screws or 3M tapes