York S1-55000-328 Detector Head Els PW 17895 use a multimeter to check

use a multimeter to check for electrical continuity across the terminals

For HVAC technicians and mechanical contractors

providing contractors with a robust component that maintains set point accuracy under rigorous environmental conditions

Such specifications make it an ideal fit for managing liquid line temperatures or discharge air in high-demand heating and cooling cycles

reducing the risk of biological growth within the pan

York S1-55000-328 Detector Head Els PW 17895 use a multimeter to checkThe York S1 55000 328 is a high sensitivity photoelectric duct detector head engineered for rapid smoke detection within environmental air ducts. This OEM York replacement part serves as the direct successor to the legacy S1 55000 225 ionization head, facilitating a critical transition from ionization to photoelectric smoke sensing technology. By utilizing an infrared LED and photo diode arrangement, the S1 55000 328 excels at detecting slow burning,