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