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United Electric (UE) 117 Series Explosion-Proof Temperature Switches

Approved for Division 2 hazardous locations and corrosive atmospheres, United Electric's 117 Series can be used to measure temperature in a variety of applications. Its compact, epoxy coated enclosure and hermetically sealed snap switch provide superior corrosion resistance within the harshest environments, isolating the contacts from moisture, humidity, and chemical atmospheres. Popular sensors in a variety of materials are available, ranging from all welded stainless steel to elastomer diaphragms.

Key Specifications

  • Adjustable Ranges from -120° to 640°F
  • Epoxy Coated Body and Stainless Steel Wetted Parts
  • Hermetically Sealed Snap Switch
  • SPDT or DPDT Output
  • Terminal Block Wiring
  • UL Listed, Approved for Class I and II Division 2, and Class III

Specifications, Manuals, and Supporting Literature

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Model Selection Guide

Use this table to find the right model for your application.  Don't see the option you need? Call a Lesman sales specialist at 800-953-7626

Adjustable Range Max Temp
Bulb OD
x Length
° F ° C
E117: Internal reference, 6 ft. 304 SS capillary and bulb. 1 SPDT output.
-120 to 100
30 to 250
100 to 400
350 to 640
-85 to 35
0 to 120
35 to 200
175 to 335
3/8" x 2-7/16"
3/8" x 2-7/16"
3/8" x 2-1/8"
3/8" x 3-1/4"
Adjustable Range Max Temp
° F ° C
B117: Internal reference dial, nickel-plated brass immersion stem,
1 SPDT output and 1/2" NPT connection.
0 to 225
200 to 425
-15 to 105
95 to 215
1-7/8" BT
1-7/8" BT


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