UE J21K-254 Differential Pressure Switch: 0 to 90 PSID

United Electric J21K Differential Pressure Switch - 1 SPDT Switch Output. Adjustable Range: 0 to 90 PSID; Deadband: 2 to 4 PSI. Working Pressure: 30" HgVac to 200 PSI; Proof Pressure: 90 PSI. Phosphor Bronze Bellows, 1/4" NPTF Pressure Connections. Gasketed Epoxy-Coated Diecast Aluminum Enclosure. Model formerly designated with factory stock number J21K-254 (9545)