The 646TE Series is a rugged, hazardous-locations temperature switch with a stainless steel temperature probe and port fitting. Similar to the 604 Series in design, the 646TE 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. 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 Temperature Switch Environment Hazardous Certification Agency Approvals UL, CSA, CE, CCC, DUAL SEAL Increasing Temperature Ranges -30 to 19.99°F, 20 to 405°F, 406 to 420°F Decreasing Temperature Ranges -39 to -0.01°F, 0 to 398°F, 398 to 414°F Temperature Probe Probe Operating Temperature Range -40° to 186 °F Process Connection Fitting Size Male 1/2" 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 Accessories Thermowell Increasing Temperature Range -30° to 55 °F, 35° to 140 °F, 90° to 210 °F, 175° to 310 °F, 275° to 420 °F Decreasing Temperature Range -39° to 52 °F, 21° to 135 °F, 75° to 205 °F, 159° to 305 °F, 256° to 414 °F Maximum Probe Temperature 150, 300, 500