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Advantages • Not sensitive for dust or dirt • Long life • Heater included (inside sensor) • Small size • 4/20 mA and open collector output • Fast response time Mierij Meteo

rain sensor MODEL MR 41 - 54729 OPTICAL RAIN SENSOR MODEL MR 41

Measurement principle Th is optical rain sensor has a new principleof precipitation detection. The MR 41 has infra -red/ 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.
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