UE J21K-357 Differential Pressure Switch: 0 to 70 PSID

United Electric J21K Differential Pressure Switch - 1 SPDT Switch Output. Adjustable Range: 0 to 70 PSID; Deadband: 2 to 4 PSI. Working Pressure: 30" HgVac to 350 PSI; Proof Pressure: 70 PSI. Welded 316L Stainless Steel Bellows, 1/4" NPTF Pressure Connections. Gasketed Epoxy-Coated Diecast Aluminum Enclosure. Model formerly designated with factory stock number J21K-357 (9504)