George Risk Industries Inc. 11507 Water Absence Sensor

Product Description

The GEORGE RISK INDUSTRIES INC. 11507 is a water absence sensor designed to detect the lack of water in a monitored system or vessel. This type of sensor provides a signal output when water is no longer present at the sensing point, making it a critical component in protection and monitoring circuits. It is typically installed by licensed HVAC technicians, plumbers, or building automation professionals working on hydronic systems, boilers, cooling towers, or similar water-based equipment where dry-run or low-water conditions must be detected and acted upon.

The 11507 is suited for residential and light commercial applications where reliable water-absence detection is required. It integrates into control circuits to trigger alarms, shut down pumps, or disable heating equipment when water is absent, helping prevent equipment damage from dry operation. The part number references a 2808 series configuration with a 3-unit association as indicated by the supplier designation.

Key Features

• Detects absence of water at the sensing point for protective control circuit integration
• Compatible with alarm, relay, and shutdown circuit applications
• Sold as a single unit (each) for straightforward replacement or new installation
• Part of the GRI temperature and fluid sensing product line for building and HVAC applications

Compatibility

Designed as an OEM-style replacement or new-installation sensor for water monitoring and absence-detection circuits in hydronic, boiler, and fluid-handling systems.

Installation Notes

Installation should be performed by a licensed plumber, HVAC technician, or controls specialist familiar with low-voltage sensing circuits. Shut off water supply and de-energize the control circuit before removing or installing the sensor. Refer to the manufacturer data sheet for wiring termination guidance and ensure all work complies with applicable local codes and the National Electrical Code (NEC) where low-voltage wiring is involved.