Installation Guide for Wireless RainSensor™ TWRS and TWRFS

Name: Installation Guide for Wireless RainSensor™ TWRS and TWRFS
Brand: TORO
Availability: InStock

Brand: TORO

Category: Lawn Care

Document Type: Installation Guide

Language: EN

Uploaded: Nov. 21, 2025, 8:19 p.m.

Manual Publish Date: 2004-12-21

Warranty Information

This warranty covers the Toro Wireless Rain Sensor models TWRS and TWRFS for five years from the date of installation.

The Toro Wireless RainSensor system, comprising a programmable receiver and a remote sensor module, automatically suspends irrigation when a set rainfall amount or temperature is met. The receiver connects to the irrigation controller and the sensor module is mounted outdoors. The system uses an ultra high-frequency radio signal for communication. Users can program a delay for the controller to resume operation after the sensor resets, and also activate a "Rain Delay" mode for inclement weather. The system features adjustable rainfall sensitivity and can be temporarily bypassed using the "Smart Bypass" button.

Troubleshooting and error codes

Problem	Solution
Reception Problems	Ensure antennas are straight and fully extended (up on receiver, down on sensor). Maintain parallel antenna orientation. Avoid proximity to large metal objects. Mount units as close together as possible. Experiment with different locations (even a few feet can help). Avoid installing the sensor module directly above the receiver. When passing through walls, aim for a straight path to minimize thickness.
Sensor not activating	Check receiver wiring connections at the controller. Ensure the controller's sensor control or bypass switch is active. Verify the sensor module is not in contact with sprinkler spray or roof runoff. Check the installed rainfall threshold setting.
Sprinklers do not shut off	Recheck receiver wiring connections at the controller. Ensure the controller's sensor control or bypass switch is set to enable the sensor circuit.