The 604DM Series is a general purpose, all aluminum differential pressure switch with DPDT. It is constructed with an integral terminal box and switch design and easy set point adjustment. It is also easily mounted to bulkheads and UL certified with NEMA 4 and IP65 rating. It has high vibration and shock resistance utilizing Dual Snap® disc spring technology. Applications include nonhazardous environments such as: • Power Generation • Rail Car • Fluid Management • Manufacturing Process • Utilities, Water Treatment and Waste • Chemical Refining and Processing • Heavy Vehicles • Safety Systems Environmental Approvals IP65, NEMA 4, NEMA 13, NACE, RoHS Industry Industrial Instrumentation Pressure Switch Environment Non-Hazardous Certification Agency Approvals UL, CE, CRN, CCC Operating Temperature Range -40° to 186 °F Process Connection Fitting Size Female 1/4" NPT Process Connection Material Aluminum Housing Enclosure Aluminum Electrical Connection Female 3/4" NPT Electrical Switch Type DPDT Voltage Electrical Rating VAC 0 to 250 VAC, 251 to 480 VAC Amperes Electrical Rating 0.5 to 5 A Fixed or Adjustable Set Point Adjustable Presetting Factory Set, Not Factory Set Tagging Mylar, Stainless Steel Accessories Manifold Increasing Pressure Range 1.4 to 18 PSID, 6 to 75 PSID Decreasing Pressure Range 0.5 to 17.1 PSID, 2 to 71 PSID Pressure Type Differential Media Oil Based, Non-Oil Based Increasing Pressure Ranges 1.16 – 2.99 PSI, 3 – 180 PSI Decreasing Pressure Ranges 0 – 1.15 PSI, 1.16 – 173 PSI Maximum System Pressure 400 Maximum Proof Pressure 750 Process Connection Seal O-Ring Sealed Diaphragm Diaphragm Polyimide O-ring Viton