System Sensor D4120W Detector Els PW 17895 It features a robust electrode

It features a robust electrode system and integrated protection circuitry

If your coil is burnt out or shows signs of insulation failure

If your system requires pressure regulation at the valve

you should verify if part numbers 512-200-078 or 512-200-079 are required for your specific manifold configuration

This model is set to 250/190 PSI

System Sensor D4120W Detector Els PW 17895 It features a robust electrodeThe System Sensor D4120W is a high performance 4 wire photoelectric duct smoke detector specifically engineered for harsh environments and outdoor rooftop HVAC installations. This air duct smoke detector features a NEMA 4 watertight enclosure, providing superior protection against windblown dust, rain, and splashing water. Utilizing integrated low flow technology, the unit operates efficiently in airflow speeds ranging from 100 to 4,000 feet per