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Hydro-Rain HRC-100-RS-RF Wireless Rain & Freeze Sensor

Brand: Hydro-Rain | SKU: HRC-100-RS-RF

Product Overview

The Hydro-Rain HRC-100-RS-RF is a wireless rain and freeze sensor for compatible 24 VAC irrigation controllers. It uses hygroscopic discs to detect rainfall and includes freeze sensing that can suspend irrigation when temperatures approach freezing conditions.

Key Features

  • Wireless rain and freeze sensing
  • Adjustable rainfall activation settings
  • Hygroscopic-disc rain sensing
  • Freeze shutoff near 37°F
  • Wireless range over 300 ft. line of sight
  • Manual bypass control
  • Tool-free rain-gutter mounting bracket
  • Adjustable dry-out vent

Common Uses

  • Automatically suspending irrigation during rain or near-freezing temperatures
  • Residential and light-commercial sprinkler systems
  • Adding wireless weather shutoff capability to compatible controllers

Technical Specifications

  • Model: HRC-100-RS-RF
  • Sensor Type: Hygroscopic rain sensor with freeze sensing
  • Rain Sensitivity: Adjustable from approximately 1/8 in. to 1 in.
  • Freeze Sensitivity: 37°F ± 3°F
  • Operating Temperature: 14°F to 140°F
  • Receiver Power: 22-28 VAC
  • Transmitter Power: Two CR2032 3V cells
  • Wireless Range: Over 300 ft. line of sight
  • Relay Contacts: Normally open and normally closed, 3 A at 24 VAC

Compatibility & Installation Notes

Verify the irrigation controller accepts a compatible sensor input and mount the transmitter where it is exposed to natural rainfall without direct sprinkler spray. Wireless range depends on site conditions and obstructions.

Frequently Asked Questions

Does this model detect both rain and freezing conditions?
Yes. It provides rainfall sensing and a freeze shutoff threshold near 37°F.

How far can the wireless signal reach?
Hydro-Rain lists more than 300 feet line of sight.

Can the rainfall threshold be adjusted?
Yes. Multiple rainfall settings are available between approximately 1/8 inch and 1 inch.

Why Buy Hydro-Rain HRC-100-RS-RF from Big Frog Supply?

The HRC-100-RS-RF adds wireless rain and freeze shutoff capability to compatible irrigation controllers without requiring a hardwired sensor run.

OPERATING 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 3A@24 VAC
UL Listed, FCC, CE

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