it requires a physical inspection of the furnace cabinet before the burner can be relit

preventing short-cycling and hunting

sharing the same 1/2" NPT inlet/outlet specifications

What refrigerant is this unit compatible with

75 psi between 300-400 psig

Cleveland Controls NS2-0548-00 Pressure Switch 323269-701 it requires a physical inspectionThe Cleveland Controls NS2 0548 00 Air Flow Sensing Switch is a high precision differential pressure switch engineered for critical HVAC monitoring. This unit is factory calibrated at a 0. 98" w. c. set point, providing reliable air pressure differential detection in furnaces, air handlers, and ventilation systems. Built with a rugged glass filled polycarbonate housing and a high grade silicone diaphragm, the NS2 0548 00 ensures long term stability