Local Mount Temperature Switch

Barksdale_Temp Switch_ML1H Description
Barksdale's ML1H and L2H Series Temperature Switches provide unmatched performance, quality and reliability in a mechanical thermostat. The single set point ML1H and dual set point L2H, can switch, measure and control temperatures from -50° to 450°F (-45° to 232°C), while the optional adjustable differential provides precise control. These locally mounted switches provide fast response and accurate measurements at the temperature source. Both the ML1H and L2H Series are electrically rated for 10 amps @ 125/250 VAC & 3 amps @ 480 VAC. Standard 3- and 6-pin terminal strips simplify installation. The ML1H and L2H Series are rated NEMA 4 & 13; the optional NEMA 4X construction protects the rugged die-cast aluminum enclosure from corrosive environments. Copper or stainless steel temperature sensors are available to handle a wide range of media. Optional thermowells allow the sensor to work in pressurized vessels to 5000 psi. UL listed and CSA approved, ML1H and L2H Series Temperature Switches are perfect for your temperature sensing needs.



  • Reliable and accurate
  • Local sensing
  • NEMA 4 & IP 65
  • UL, CSA & CE approved
  • Single or dual switching


  • Oil & gas
  • Mining
  • Tanks and reservoirs
  • Compressors
  • Plastic machinery
  • Factory automation
  • 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).
Single: 1 SPDT
Dual switching: 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: Brass 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: Water-tight and dust-tight indoor and outdoor (NEMA 4) / oil-tight and dust-tight indoor (NEMA 13).
Local Mount: Immersion length 2-1/16 inches
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.