Hydreon RG-11 Optical Rain Sensor

Optical Rain Sensor RG-11
Image Copyright Hydreon Corporation


The RG-11 is a optical water sensor. It senses water hitting its outside surface using beams of infrared light.

There are seven modes of operation which are set using the dip switches located on the circuit board inside the sensor.

Rain Sensor RG-11 Circuit Board
  • Tipping Bucket
  • It's Raining
  • Condensation Sensor
  • Windscreen Wiper
  • Irrigation Control
  • Drop Detection
  • First Flush / Rain Water Harvest
  • Input Voltage: 12 – 30VDC or 12 – 26 VAC
  • Output: Relay closure, Normally Open and Normally Closed contacts.
  • Max load: 1A, 24 VDC.
  • Reverse Polarity protection to 50V
  • Operating Temperature Range: -40 C to +60C
Wiring details for Tipping Bucket Mode. Refer to the Instructions for the other modes of operation. RG-11 Tipping Bucket Circuit RG-11 Tipping Bucket Switch Settings