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.
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