Dragino WSS-24, Rain and Snow Sensor with Heating, RS485

The Dragino WSS-24 detects whether precipitation in the form of rain or snow is currently falling and reports this event via RS485. An automatic surface heater dries the sensor surface after precipitation and melts snow, ensuring the end of an event is reliably detected. The grid electrode is electroless nickel-plated and gold-plated (ENIG), protecting it against corrosion for long-term outdoor use.

Main Features:

• Detection of precipitation events (rain or snow) as a status report, not a quantitative measurement
• Automatic surface heating: starts below 15 °C and switches off at 25 °C by default
• Corrosion-resistant grid electrode with ENIG (Electroless Nickel/Immersion Gold) coating
• RS485 interface with Modbus command set, can be operated directly on the WSC2-L main unit (standard baud rate 4800)
• Mounted with a 15° incline to the horizontal so that water and snow run off the sensor surface

Specifications:

• Measured variable: Precipitation yes/no (rain or snow)
• Supply voltage: 12 to 24 V DC
• Interface: RS485
• Standard baud rate (with WSC2-L): 4800
• Current consumption without heating: 12 mA at 12 V
• Current consumption with heating: 94 mA at 12 V
• Heating: Switch on below 15 °C, switch off at 25 °C (default value)
• Operating temperature: -30 °C to +70 °C
• Operating humidity: 10 to 90 % RH
• Dimensions: 14.5 × 8 × 5 cm
• Weight: 318 g
• Scope of delivery: 1 × WSS-24

Application Areas:

• Agricultural weather stations based on the Dragino WSC2-L for recording the start and duration of precipitation events
• Irrigation control to interrupt sprinkler systems when rain begins
• Building automation, e.g., automatic closing of skylights, roof domes, or retracting awnings
• Winter maintenance and infrastructure, e.g., triggering ramp, gutter, or open-space heating during snowfall

Documents:

• User Manual