This specific 1 5/8 inch HVAC valve ensures a leak-free interface

No External Tools Required: Fully configurable via the onboard HMI

Fail-Safe Operation: Power-close / spring-return open design ensures airflow remains unrestricted during power failures

Versatile bullet probe design allows for custom sensor assembly or direct field replacement

Siemens Combustion QRI2B2.B180B1 Flame Detector 320788-704 This specific 1 5/8 inchThe Siemens QRI2B2. B180B1 is a high sensitivity infrared flame detector designed for the supervision of gas, oil, or coal flames in large scale industrial or commercial burner systems. Engineered for lateral (side viewing) illumination, it features a 90 degree light entry path, making it the standard choice for specific burner mounting configurations where frontal line of sight is obstructed. This self checking sensor operates within a 1 to 3 m