ZoneFirst ZPS Zone Plenum Sensor the SPDT configuration allows for

the SPDT configuration allows for both normally open and normally closed operations

Its non-electrolytic build ensures the unit remains corrosion resistant even when exposed to salts

the sensor may be fouled or defective

requiring a physical reset by a technician once the thermal event is resolved and the system has cooled

this relay operates on a 24VAC control circuit to manage critical system loads

ZoneFirst ZPS Zone Plenum Sensor the SPDT configuration allows forThe ZoneFirst ZPS Zone Plenum Sensor is a critical duct mounted sensor designed for accurate supply air temperature monitoring in both residential and commercial HVAC zoning systems. This plenum rated temperature sensor integrates directly with MasterZone control panels to safeguard the heat exchanger and cooling coil. By providing real time data to the panel, the ZoneFirst ZPS prevents equipment damage caused by excessive heat or freezing