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WS302-868M - LoRaWAN Sound Level Sensor
WS302-868M - LoRaWAN Sound Level Sensor
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Product Description
WS302-868M LoRaWAN Sound Level Sensor is a compact, battery-powered wireless noise-monitoring device with an integrated microphone.
It measures ambient sound levels and sends data through a compatible LoRaWAN network, helping organisations monitor noise conditions in smart buildings, schools, offices, healthcare environments and smart-city deployments.
Designed for different acoustic monitoring scenarios, the WS302 supports A- and C-frequency weighting (software selectable), optional Fast time weighting , and three reported sound measurements: actual sound pressure level (SPL Actual), equivalent continuous level (Leq), and maximum sound level (Lmax) .
Its rated measurement ranges are 30–120 dBA and 35–120 dBC , with ±3 dB accuracy between 0°C and +45°C, 0.1 dB resolution , and acoustic frequency response from 30 Hz to 8 kHz .
Applications
Environmental Monitoring
Workplace Monitoring
Smart Building
Facility Maintenance
Remote Equipment Monitoring
Wireless Sensor Networking
Product Specifications
| Manufacturer / OEM | Milesight |
| Model / Part Number | WS302-868M |
| Product Category | DAQ & Sensors / Sound Level Sensor |
| Device Type | Wireless Sound Level Sensor with integrated microphone |
| Sound Measurement Modes | SPL Actual, Leq (equivalent continuous), Lmax (maximum) |
| A-Weighted Measurement Range | 30 to 120 dBA |
| C-Weighted Measurement Range | 35 to 120 dBC |
| Measurement Accuracy | ±3 dB from 0°C to +45°C |
| Measurement Resolution | 0.1 dB |
| Acoustic Frequency Range | 30 Hz to 8 kHz |
| Frequency Weighting | A-Weighting and C-Weighting (software selectable) |
| Time Weighting | Fast |
| Alarm Function | Sound threshold alarm; LED alarm indication |
| Wireless Technology | LoRaWAN® |
| Requested Regional Frequency | EU868 / 868 MHz (WS302-868M) |
| Other WS302 Family Frequency Variants | CN470, IN865, RU864, US915, AU915, KR920, AS923-1/2/3/4 (model-dependent) |
| Transmit Power at 868 MHz | 16 dBm |
| Receiver Sensitivity | −137 dBm at 300 bps |
| LoRaWAN Modes | OTAA/ABP Class A |
| Antenna | Internal |
| Power / Reset Control | 1 × power/reset button |
| LED | 1 × status/alarm indicator |
| Local Power Control | NFC mobile app or power button |
| Configuration | NFC mobile app or LoRaWAN downlink |
| Remote Monitoring | Compatible Milesight gateway, Milesight IoT Cloud and LoRaWAN network server |
| Power Supply | 2 × replaceable 2,700 mAh ER14505 Li-SOCl₂ batteries |
| EU868 Battery Life SF7 / Fast Disabled | Approximately 5 years |
| EU868 Battery Life SF10 / Fast Disabled | Approximately 3.3 years |
| EU868 Battery Life SF7 / Fast Enabled | Approximately 1.7 years |
| EU868 Battery Life SF10 / Fast Enabled | Approximately 1.5 years |
| Battery Life Test Conditions | 10-minute reporting interval, 25°C, laboratory guidance only |
| Operating Temperature | −20°C to +60°C |
| Relative Humidity | ≤95% (non-condensing) |
| Ingress Protection | IP30 |
| Enclosure Material | PC+ABS |
| Enclosure Colour | White |
| Dimensions | 68 × 65 × 20.5 mm |
| Weight | 79.1 g including batteries |
| Installation | Flat surface with screws or 3M adhesive tape |
| Manufacturer Regulatory Approvals | CE, FCC, Telec |
| Manufacturer Environmental Compliance | RoHS |
| Warranty | 1 year (TwoElectrons seller warranty) |
| Indian Deployment Note | Verify regional frequency plan and local regulatory approvals before deploying EU868 equipment |
Product Features
- Integrated microphone senses ambient sound levels for long-term environmental noise monitoring.
- Specified sound measurement range is 30 dBA to 120 dBA in A-weighting mode.
- Specified sound measurement range is 35 dBC to 120 dBC in C-weighting mode.
- Measurement accuracy is ±3 dB between 0°C and +45°C under manufacturer test conditions.
- 0.1 dB measurement resolution supports monitoring of changes in ambient sound levels.
- Audio response frequency range is 30 Hz to 8 kHz.
- A and C frequency weightings can be selected in software to fit the application.
- Supports Fast time weighting for short-term response when enabled.
- Outputs SPL Actual, Leq (equivalent continuous sound level) and Lmax (maximum measured level).
- Threshold alarms are supported, with a built-in LED status/alarm indicator.
- Wireless technology uses LoRaWAN® OTAA/ABP Class A and an internal antenna.
- The requested WS302-868M uses 868 MHz / EU868; the WS302 family also offers IN865 and other regional variants.
- Transmit power at 868 MHz is 16 dBm, with receiver sensitivity −137 dBm at 300 bps.
- NFC allows mobile-app configuration and device power on/off; a hardware power/reset button is also provided.
- Remote configuration is supported by LoRaWAN downlink through suitable network infrastructure.
- Integrates with standard LoRaWAN gateways/network servers and Milesight IoT Cloud.
- Power supply is two replaceable 2,700 mAh ER14505 lithium thionyl chloride (Li-SOCl₂) batteries.
- EU868 battery-life estimate with Fast weighting disabled: approximately 5 years (SF7) or 3.3 years (SF10).
- EU868 battery-life estimate with Fast weighting enabled: approximately 1.7 years (SF7) or 1.5 years (SF10).
- Battery estimates are for 10-minute reporting at 25°C in laboratory conditions; operating settings substantially affect endurance.
- Suitable operating temperature is −20°C to +60°C; relative humidity is up to 95% non-condensing.
- IP30 white PC+ABS housing measures 68 × 65 × 20.5 mm and weighs 79.1 g with batteries.
- Supports flat-surface installation with screws or 3M tape.
- Manufacturer datasheet lists CE, FCC and Telec regulatory approvals, with RoHS environmental compliance.
- LoRaWAN EU868 is not interchangeable with India's IN865 plan. Verify factory frequency and relevant radio approvals.
Package Includes
- 1 × Milesight WS302-868M LoRaWAN® Sound Level Sensor
- Power specification: 2 × replaceable ER14505 Li-SOCl₂ 2,700 mAh batteries; confirm whether batteries are installed/supplied in the final package
- Installation supports screws or 3M mounting tape; supplied installation accessories depend on OEM packing list
Frequently Asked Questions
What does the Milesight WS302-868M Sound Level Sensor measure?
Does the WS302 support A/C frequency weighting and Fast time weighting?
How is the WS302-868M connected and configured?
What batteries does the WS302 use, and what is the expected lifespan?
How is the WS302 installed, and what is included in the package?
Other Information
Warranty Information
1 Year Seller Warranty
This item is covered with a standard warranty of 1 year from the time of delivery against manufacturing defects only. This warranty is given for the benefit of TwoElectrons customers from any kind of manufacturing defects. Replacement will be done against manufacturing defects.
What Voids Warranty
If the product is subject to misuse, tampering, static discharge, accident, water or fire damage, use of chemicals & soldered or altered in any way.
Shipping & Returns Policy
Shipping Policy:
- In-stock items are delivered within 7-10 working days for orders within India. Delivery varies based on location and courier service.
- In-stock items are delivered within up to 20 working days for orders outside India. Delivery varies based on location and courier service.
- If the item is out of stock, you can still place an order. The estimated delivery time will be notified to you by email.
Return & Refund Policy:
- Return window: 7 days from receipt unless stated otherwise.
- No refunds or replacements after the return window.
- Returns are accepted only for non-working or damaged products.
- Initiate return requests from here: Return Request or contact us at 09831070550.
- Refunds are processed within 3-4 working days after inspection and approval.
Main Features
- LoRaWAN® WS302-868M wireless sound level sensor with built-in microphone
- Sound pressure level measurement: 30–120 dBA and 35–120 dBC
- Selectable A- and C-frequency weighting to suit different noise-monitoring scenarios
- Supports Fast time weighting for time-sensitive sound readings
- Measures actual sound pressure level (SPL Actual), equivalent level (Leq), and maximum level (Lmax)
- 0.1 dB measurement resolution and ±3 dB accuracy (0°C to +45°C)
- Monitors acoustic signals across a frequency range of 30 Hz to 8 kHz
- Sound-level threshold alarms with LED status/alarm indicator
- 868 MHz EU868 LoRaWAN® communication; internal antenna; OTAA/ABP Class A
- NFC/mobile-app commissioning and supported LoRaWAN downlink settings
- Remote monitoring using compatible Milesight LoRaWAN gateway, IoT Cloud and standard network servers
- Two replaceable 2,700 mAh ER14505 Li-SOCl₂ batteries
- EU868 battery estimates up to approximately 5 years in lab conditions when Fast weighting is disabled at SF7
- Compact indoor IP30 housing, 68 × 65 × 20.5 mm and 79.1 g with batteries
- Easy wall/flat-surface mounting with screws or 3M adhesive tape
- Suitable for smart buildings, campuses, schools, offices and noise-monitoring installations
SKU: 2ESE2135
₹ 17,821.00
For bulk orders, volume pricing & B2B enquiries, contact our team →
Lead time
| QUANTITY | DISPATCH |
|---|---|
| 1-10 units |
Order from India: 7-10 working days Order outside India: Up to 20 working days |
| 10+ units | To be negotiated |
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