Hydro-Rain - HRC-100-RS-HW - HRC Rain Sensor Hardwire

Product Overview

The Hydro-Rain HRC-100-RS-HW is a hardwired rain sensor for compatible 24 VAC irrigation controllers. It uses hygroscopic discs to detect rainfall and interrupt scheduled irrigation when the selected rain threshold is reached.

Key Features

• Hardwired rain sensor
• Adjustable rainfall settings
• Hygroscopic-disc sensing
• Compatible with many 24 VAC irrigation controllers
• 30 ft. jacketed connection wire included
• Rain-gutter mounting bracket
• 1/2 in. conduit mounting option with adapter
• Adjustable dry-out vent

Common Uses

• Automatically suspending irrigation during rainfall
• Residential and light-commercial sprinkler systems
• Adding weather shutoff capability to compatible controllers

Technical Specifications

• Model: HRC-100-RS-HW
• Sensor Type: Hygroscopic discs
• Rain Sensitivity: Adjustable from approximately 1/8 in. to 1 in.
• Operating Temperature: 14°F to 140°F
• AC Supply: 24-26 VAC
• Relay Contacts: Normally open and normally closed, 3 A at 24 VAC
• Dimensions: Approximately 3-1/2 in. H x 4-1/2 in. L
• Included Wire: 30 ft.

Compatibility & Installation Notes

Verify the irrigation controller accepts a compatible rain-sensor input and confirm the desired mounting location before installation. Position the sensor where it is exposed to natural rainfall but not directly affected by irrigation spray.

Frequently Asked Questions

Does this model include freeze sensing?
No. HRC-100-RS-HW is the hardwired rain-only model.

Can the rainfall threshold be adjusted?
Yes. The sensor supports multiple rainfall settings between approximately 1/8 inch and 1 inch.

How does it connect to the controller?
It uses hardwired relay contacts and includes 30 feet of connection wire.

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

The HRC-100-RS-HW adds simple hardwired rain shutoff capability to compatible irrigation controllers without adding a separate wireless receiver.