Rain sensor MIERIJ METEO

The optical rain sensor 205 has a new principle of precipitation detection. The 205 has infrared/ red transmitters and an infrared/red receiver.
Only changes on the glass surface of the sensor are measured. For this reason the sensor is not sensitive for dust or dirt. The output signal switches between 4 and 20 mA (open collector output is also available). No precipitation is equal
to 4 mA and precipitation is equal to 20 mA. When there is precipitation the open collector output switches to GND (Ground). A heater is mounted to prevent failure due to dew and to ensure a fast response time at the end of a
precipitation period.

More specifications...