Renke RS485 Modbus Relay Output Rain and Snow Sensor with Heating

Detects presence of rain or snow within 0.5 seconds of surface contact, enabling near-instant alarm triggering for greenhouse covers, highway alerts, and weather station event logging.

Alternating current detection method actively prevents electrode oxidation over time, maintaining long-term sensitivity without the signal degradation common in DC-based conductive rain sensors.

Built-in heating element switches on automatically below 15 degrees C, melting snow on contact and enabling reliable snow detection in freezing temperatures where unheated sensors fail entirely.

Maximum heating temperature is 40 degrees C, preventing overheating that would accelerate electrode oxidation and degrade sensing surface sensitivity during extended winter operation.

Recommended 15 degree tilt installation prevents rain and snow from pooling on the sensing surface, ensuring the sensor resets cleanly after precipitation stops without false extended alarm states.

Both alarm activation delay and reset delay are software-configurable, suppressing nuisance repeated alarms in drizzle or intermittent precipitation conditions without missing genuine rainfall events.

Choose RS485 for digital network integration, relay for direct equipment switching, or the combined mode for simultaneous data logging and physical alarm or actuator control in one unit.

Built-in relay supports direct wiring to audible and visual alarms or greenhouse actuators without external relay modules, reducing wiring complexity and component count in control panels.

Full IP68 protection on ABS housing ensures the sensor body remains sealed against continuous rain, snow immersion, and condensation during long-term outdoor installation in exposed locations.

Broad voltage input supports diverse DC power supplies. Normal operation draws only 0.4W, with heating mode consuming 7.5W, enabling solar-powered deployment with appropriately sized panels.