The hazardous locations 646DZEY Series is a rugged, heavy duty differential pressure switch with a stainless steel port for corrosion resistance and wet conditions. Similar to the 604 Series in design, the 646DZEY Series is rated to 15 Amps and UL/CSA explosion proof, Class I, Groups A, B, C and D, and Class II Groups E, F and G certified and ATEX/IECEx II 2 G D Ex d IIC and Ex to IIIC. It comes with high vibration and shock resistance utilizing Dual Snap® disc spring technology. Applications include: • Oil & Gas • Power Generation • Fluid Management • Chemical Refining and Processing • Manufacturing Process • Utilities, Water Treatment and Waste • Safety Systems Environmental Approvals IP65, IP66, NEMA 4, NEMA 4X, NEMA 7, NEMA 9, NEMA 13, NACE, SIL, RoHS Industry Industrial Instrumentation Pressure Switch Environment Hazardous Certification Agency Approvals UL, CSA, ATEX, IECEx, CE, CRN, CCC, DUAL SEAL Operating Temperature Range -40° to 186 °F Process Connection Fitting Size Female 1/4" NPT Process Connection Material Stainless Steel Housing Enclosure Aluminum Electrical Connection Male 1/2" NPT Electrical Switch Type SPDT Voltage Electrical Rating VAC 0 to 250 VAC, 251 to 480 VAC Amperes Electrical Rating 0.2 to 15 A Junction box app 141-18, 141-19, 141-20, 141-28 Fixed or Adjustable Set Point Adjustable Presetting Factory Set, Not Factory Set Tagging Mylar, Stainless Steel Increasing Pressure Range 1.2 to 18 PSID, 6 to 75 PSID Decreasing Pressure Range 2 to 71 PSID, 0.4 to 17.2 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