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