Series MT1H and T2H

Barksdale_Temp Switch_MT1H Description
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.



  • Reliable & accurate
  • Ambient compensated
  • NEMA 4, 13 and IP 65
  • UL, CSA & CE approved
  • Single or dual switching


  • Marine & shipbuilding
  • Railroad
  • Oil & gas
  • Medical
  • Compressors
  • Water equipment
  • Process equipment
  • Machine tools and industrial equipment



Accuracy: (Repeatability) ±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 75% 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 on Barksdale Data Sheet
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 on Barksdale Data Sheet
Adjustment: Tamper resistant external adjustment. Turn knob clockwise to increase setpoint. (Knob indication is reference only).
Single:  approximate 1.5 lbs.
Dual:  approximate 3.0 lbs.