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Hydro-Rain HRC-100-RS-RF HRC 100 Wireless Rain Sensor w/ Receiver

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Sale Price $59.25
Our Price $92.01
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Hydro-Rain HRC-100-RS-RF

HRC 100 Wireless Rain Sensor

Hydro-Rain’s HRC 100 wireless rain or rain/freeze sensor saves water by automatically suspending irrigation watering cycles when it rains or freezes or both! This Hydro-Rain® Sensor provides conservation, convenience, and flexibility to your fully automatic watering system. After a set amount of rain has fallen, the sensor will send a wireless signal to the receiver and prevent the timer from watering. When the freeze sensor option switch is activated the sensor interrupt s watering when the temperature drops on or below 37°F ± 2° (3°C ± 1°).

Hydro-Rain HRC-100-RS-RF

Product Details

  • Easy No Tools Required - Rain gutter mount bracket is equipped with a tool-free bolt system that is both quick and intuitive to install.
  • Adjustable Moisture Activation - ⅛", ¼", ½", ¾", 1" rainfall settings for variable climates.
  • Hygroscopic Discs - Absorb water to activate rain switch.
  • Reliable Freeze Sensor Option - Shuts off timer when the temperature drops to 37°F, protecting vegetation from the effects of freezing water.
  • Universal - For use with most brands of 24 Volt sprinkler timers.
  • Quick Rain Gutter Mount - No tools required for mounting the sensor to a rain gutter.
  • Constant Communication - Every 30 seconds, (HRC 300/390 models), a signal between the transmitter and receiver for accurate timed water metering. All other timers transmit the updated signal every 15 minutes.
  • Transmission Range - Over 300 feet (91.4 m) line of sight.
  • Manual Bypass Control - Allows for deactivation during sprinkler system maintenance.
  • Dry Vent - Allows air to be circulated or dampened for fast or slow dry, effectively reducing the time for the next watering cycle.

Operations Specifications

  • Sensor Type: Industry-standard hygroscopic discs
  • Rain Sensitivity: Adjustable nominal 1⁄8" to 1" (3-25mm)
  • Freeze Sensitivity: 37°F (2,7°C) +/- 3°F
  • Operating Temperature: 14°F to 140°F (-10°C to 60°C)
  • Housing Material: UV-resistant engineered polymer
  • Receiver Power: 22-28 VAC
  • Transmitter Power: Two CR2032 3V cell, 5-year life (typical use)
  • Dimensions: Transmitter - Height: 4" (10,1 cm), Length - 3.15" (8,0 cm), Receiver - Height: 3.75" (9,5 cm), Length - 1.1" (2,7 cm)
  • Electrical Specifications: AC Supply - 24~26 VAC, Relay Contacts Output - Normal open & normal close [email protected] VAC, UL Listed, FCC, CE
Product Tag:
Best Value
Product Type:
Rain Sensor
Sensor Material:
Rain Sensor
Sensor Connection:
3.5 / 5.0
2 Reviews
5 Stars
4 Stars
3 Stars
2 Stars
1 Star
Excellent product, service and price! Will definitely use this company in future orders!
July 31, 2017
over 3 years ago
Not That Great
I have had this unit for 2 years. Now, it is stuck closed so sensor is constantly on not allowing for controller to water. In 2 years, this sensor has gone on only twice to over-ride the controller during large, long, rains. Even set at 1/8th inch of rain, it hardly ever over-rides the controller....so it still watered during rain..
September 30, 2019
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Browse 5 questions Browse 5 questions and 12 answers
Why did you choose this?
SprinklerWarehouse.com Store
My current sensor is corroded internally, and non-functional.
Q U on Mar 25, 2018
My current sensor is corroded internally, and non-functional.
Q U on Mar 25, 2018
Roofing contractors damaged my sensor
J B on Sep 14, 2017
Roofing contractors damaged my sensor
J B on Sep 14, 2017
How do you replace the batteries in the hydro-rain lrc 100 sensor?
A shopper on Jan 24, 2018
BEST ANSWER: There is a battery compartments on the bottom of the unit. It uses two "button" batteries. You can get them at HD or Lowes. Very easy to replace.
Where can I get the user manual for this Hydro-Rain HRC-100-RS-RF?
Rick M on Sep 6, 2017
BEST ANSWER: Here is the link to a PDF for the Manual


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