The Honeywell Analytics 00705-A-1735 3/4-inch High-Temperature Combustible Sensor is a gas detection component designed for compatible industrial and HVAC safety systems. It detects combustible gases in its operating environment and provides a signal to connected monitoring equipment when gas concentrations reach specified levels. Suitable for compatible combustion systems, boiler roo... https://www.partshnc.com/honeywell-analytics-00705-a-1735-3-4-high-temperature-combustible-sensor