Switches > Temperature Switches > UE Spectra 12 Series


United Electric (UE) Spectra 12 Temperature Switches with Bulb and Capillary System

United Electric 12 Series hazardous location switches are ideal for operation in tough applications where space is at a premium. A Belleville spring assembly provides vibration resistance and prolonged switch life. Its small conical washer transfers motion to a hermetically sealed 1 or 5 amp microswitch. The Belleville spring snaps over when pressure is applied and snaps back on pressure release.

The 316 stainless steel enclosure and hermetically sealed switch provide rugged protection from the environment. The easily accessible adjustment wheel allows in-line field settings. A 1 Amp switch is available for use in intrinsically safe circuits. Approved for use in hazardous locations worldwide, the 12 Series is installed within applications ranging from offshore oil rigs to rotating equipment, and more.

Key Specifications

  • Adjustable Range -130° to 650°F
  • Stainless Steel Body, 304 Stainless Steel Bulb and Capillary
  • Ambient Temperature Compensation
  • Mount Up to 50 Feet Away With Extra Length Capillary
  • Single SPDT Switch Output, Two SPDT for DPDT Action
  • UL, cUL, and CENELEC Approvals for Use In Division 1 or Zone 1 Hazardous Environments

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

Make a selection from each table section below. A finished model number
looks like this: 12S-H-D-M-R2/M430

Description Catalog Number
Spectra 12 Switch, Stainless Steel Housing 12S
5 Amp Electrical Rating
1 Amp Electrical Rating
Output SPDT
Connection 1/2" NPTM Electrical conduit
M20 Electrical Conduit
Model -130° to 120°F, 3/8" x 4-7/8" Bulb
0° to 150°F, 3/8" x 7-1/4" Bulb
50° to 300°F, 3/8" x 4-7/8" Bulb
150° to 650°F, 3/8" x 4" Bulb
0° to 225°F, SS Immersion Stem
200° to 425°, SS Immersion Stem
Options Factory Set Switch
Cover Lock
Stainless Steel ID Tag and Wire
DIN Connector, 4 Terminal
Mounting Bracket Kit


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