WS302 – LoRaWAN Sound Level Sensor SPL, Leq, Lmax – Milesight
General Description
The Milesight WS302 is a LoRaWAN® sound sensor designed to monitor ambient noise in indoor environments. It measures SPL, Leq, and Lmax over a range of 30 to 120 dB, with A/C frequency weighting and a fast response mode. Easy to configure via NFC, it is suitable for applications in schools, offices, hospitals, or light industry. It mounts discreetly on a wall and operates on replaceable batteries for long battery life.
Targeted Applications
- Acoustic monitoring in schools, hospitals, offices
- Noise pollution control in urban environments
- Sound analysis in public spaces
- Smart building management
Highlights
- Sound measurement from 30 to 120 dB (A and C)
- Accuracy ±3 dB with 0.1 dB resolution
- A/C Weighting and Fast Time Weighting
- Current SPL outputs, Leq, Lmax
- LoRaWAN® Class A transmission
- Easy setup via NFC
- Powered by 2 replaceable 2700 mAh batteries
- Adhesive or screw wall installation
Technical Specifications
Transmission |
Technology |
LoRaWAN® |
Supported frequencies |
CN470 / IN865 / RU864 / EU868 / US915 / AU915 / KR920 / AS923-1/2/3/4 |
Transmit power |
16 dBm (868 MHz), 22 dBm (915 MHz), 19 dBm (470 MHz) |
Sensitivity |
-137 dBm @300bps |
Fashion |
OTAA / ABP – Class A |
Sound Measurement |
Measuring range |
30 to 120 dBA, 35 to 120 dBC |
Precision |
± 3 dB (from 0 °C to +45 °C) |
Resolution |
0.1 dB |
Frequency band |
30 Hz to 8 kHz |
Weighting |
Frequency: A and C (software) Time: Fast |
Units of measurement |
SPL, Leq, Lmax |
Configuration and Functions |
Configuration |
Via NFC (mobile application) |
Button |
1 Power / Reset button |
LED indicator |
1 status/alarm LED |
Physical Characteristics |
Food |
2 × replaceable ER14505 2700 mAh batteries |
Operating temperature |
-20°C to +60°C |
Relative humidity |
≤ 95% (non-condensing) |
Protection index |
IP30 |
Dimensions |
68 × 65 × 20.5 mm |
Material / Color |
PC + ABS, white |
Facility |
Flat surface (screws or 3M tape) |
Interfaces and Connectors
The WS302 features a power/reset button, LED status or alarm indicator, and is quickly set up via NFC from a mobile app.
Pack Contents
- 1 × Milesight WS302 Noise Sensor
- 2 × ER14505 2700 mAh Batteries
- 1 × Mounting kit (adhesive + screws)
- 1 × Quick Installation Guide