LoRaWAN® Sound Level Sensor

Sound Awareness for Peaceful Surroundings

CoWork Series
ws302 01 small
ws302 02 small
ws302 03 small
  • Accurate Sound Level Measurement
  • LED Alarm Indicator
  • 1.5~4 Years Battery Life
  • Easy Configuration via NFC
  • Home
  • IoT LoRaWAN® Series
  • WS302

Fight Against Uncomfortable Noise

WS302 is a LoRaWAN®-enabled sound level sensor that is designed to measure and monitor sound levels in various environments.


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
  • 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

ws302 lorawan sound level sensor size
ws302 lorawan sound level sensor

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

  • Penetrating Signals: data transmission range up to 2 km in urban areas and
    15 km in rural areas
  • High Compatibility: compliant with standard LoRaWAN® gateways and network servers

Stay Powered Up for Longer

WS302 offers over 4 years of service life without the need for battery replacement.

Cloud Data Management
Milesight IoT Cloud

  • Data Visualization Dashboard:
    All figures in a glance
  • Automatic Triggers:
    Interactive collaboration with Milesight IoT sensors
    to realize scene-based automation
  • Regular Reports & Real-Time Alerts:
    Data-based insights
  • Android & iOS App:
    Manage devices at your fingertips

NFC Configuration

Switching On/Off & Configuring the Devices Wirelessly

ws302 lorawan sound level sensor nfc configuration 1

1st Step

Install the
Milesight ToolBox

ws302 lorawan sound level sensor nfc configuration 2

2nd Step

Enable NFC and run ToolBox,
then attach your phone to the device

ws302 lorawan sound level sensor nfc configuration 3

3rd Step

Verify the password
and start configuring

Explore More About NFC Configuration >>


ws302 lorawan sound level sensor installation 2

Screw Mounting

ws302 lorawan sound level sensor installation 1

Double-Sided Tape Mounting


Wireless Transmission
Tx Power16 dBm (868 MHz)/22 dBm (915 MHz)/19 dBm (470 MHz)
Sensitivity-137 dBm @300bps
ModeOTAA/ABP Class A
Range30 dBA to 120 dBA, 35 dBC to 120 dBC
Accuracy± 3 dB (0°C to +45°C)
Resolution0.1 dB
Frequency Range30 Hz to 8 kHz
Frequency WeightingA and C Weighting (Software Switchable)
Time WeightingFast Weighting
Measurement UnitSPL Actual, Leq, Lmax
Button1 × Power/Reset Button
LED1 × Status/Alarm Indicator
Physical Characteristics
Power Supply2 × 2700 mAh ER14505 Li-SOCl2 Replaceable Batteries
Operating Temperature-20°C to +60°C
Relative Humidity≤95% (Non-condensing)
Ingress ProtectionIP30
Dimension68 × 65 × 20.5 mm (2.68 × 2.56 × 0.81 in)
Material & ColorPC+ABS, White
InstallationOn the flat surfaces with screws or 3M tapes


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