Rachio compatibility with Irritrol Wireless Rain Sensor


Rachio is NOT affiliated or authorized by IRRITROL; the IRRITROL brand rain sensors are manufactured by IRRITROL. This article is intended for instructional and compatibility purposes only.

Rachio does not recommend the use of 3rd party sensors unless required by local code. Remember to always enable Weather Intelligence features to skip watering schedules BEFORE it rains; rain sensors will only skip watering schedules AFTER it rains.

Wiring Instructions for the Irritrol Wireless Rain Sensor

  1. Wiring Chart
  2. Wiring Diagrams

1) Wiring Chart

Wire Color Gen 1 Rachio Gen 2 Rachio
White R1 (left-most yellow terminal) SC (Sensor Common - left of SP)
Red (a) R1 (paired w/ above) SC (paired with above)
Red (b) C (white terminal - far right) SP (Sensor Power - far right)
Brown R2 S1

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2) Wiring Diagrams

Generation 1

Generation 2

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