Series MT1H, T2H

  • Reliable & accurate
  • Ambient temperature compensated
  • NEMA 4, 13
  • UL, CSA & CE approved
  • Single or dual switching

Barksdale's MT1H & T2H Series Temperature Switches provide unmatched performance, quality & reliability in a mechanical thermostat. The single set point MT1H and dual set point T2H, can switch, measure & control temperatures from -50° to 650°F (-45° to 343°C), The optional adjustable differential provides precise control while ambient compensation maintains 1/2% accuracy with external temperatures from -65° to 165°F. The MT1H & T2H Series are electrically rated for 10 amps @ 125/250 VAC & 3 amps @ 480 VAC. Standard 3- & 6-pin terminal strips simplify installation. The MT1H & T2H Series are rated NEMA 4 & 13; the optional NEMA 4X construction protects the rugged die-cast aluminum enclosure from corrosive environments. A remote bulb and capillary sensor is available in copper or stainless steel allowing the switch to be mounted up to 25 feet from the temperature source. Optional thermowells allow the sensor to work in pressurized vessels to 5000 psi. UL listed & CSA approved, MT1H & T2H Series Temperature Switches are perfect for your temperature sensing needs.


General Specifications*

Accuracy: ±1% of mid-60% of full range. At constant ambient ±0.5% of full scale. (Knob indication is reference only)
Switch: One (1) SPDT or two (2) independent SPDT circuits
Electrical Characteristics: All models incorporate Underwriters’ Laboratories, Inc. and CSA listed single pole double throw snap-action switching elements. Switches may be wired normally open or normally closed.
Wetted Parts: Copper or 304 stainless steel
Electrical Connection: Single: 3-Pin terminal strip
Dual: 6-Pin terminal strip
Electrical Ratings: AC value at 50% power factor —10 amps @ 125, 250 volts AC, 3 amps @ 480 volts AC. Automatically reset by snap-action of switch.
Enclosure/Housing: Watertight and dust-tight indoor and outdoor (NEMA 4)/oil-tight and dust-tight indoor (NEMA 13).
Bulb & Capillary: 6 and 12 foot length standard. See operating characteristics and product configurator.


Underwriters’ Laboratories, Inc. and Canadian Standard Assoc. are listed under temperature indicating and regulating equipment.

File No. E56247, Guide No. XAPX
File No. LR34555, Guide 400-E-O Class 4813

Temperature Range: See product configurator
Adjustment: Tamper resistant external adjustment. Turn knob clockwise to increase setpoint. (Knob indication is reference only)
Weight: Single: approximate 1.5 lbs.
Dual: approximate 3.0 lbs.

Wiring Code

Lead Circuit #1 Circuit #2
Normally Closed Blue Orange
Common Purple Brown
Normally Open Red Yellow


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