This Honeywell Ultraviolet Sensor is a self-checking device designed for use with the R7476 control unit. The sensor operates by detecting the ultraviolet radiation emitted by combustion flames. It features a dynamic self-checking mechanism that ensures continuous monitoring and reliable performance. The sensor is equipped with a 1-inch NPT (National Pipe Thread) mounting, which allows for easy installation in various industrial settings. Its operating temperature range is -40 to +175 degrees Fahrenheit, making it suitable for a wide range of environments. The Honeywell Ultraviolet Sensor also has an electrical rating of 120V AC (Alternating Current), and it comes with a lead length of 72 inches for flexible positioning.