Series T1X, T2X, L1X

  • Explosion-proof for hazardous locations
  • High accuracy
  • Remote, local or ambient sensing
  • UL, CSA & ATEX approved
  • NEMA 4, 7, 9 & IP66

Barksdale's L1X, T1X & T2X Series Temperature Switches provide unmatched performance, quality & reliability in a mechanical thermostat - a safe solution for hazardous locations. The single set point L1X & T1X and dual set point T2X, can switch, measure & control temperatures from 50° to 650°F (-45° to 343°C), and meets Class 1, Div. 1 & 2 hazardous location requirements. The optional adjustable differential provides precise control. These switches can be mounted locally for control directly at the source or remotely up to 25 feet. The L1X, T1X & T2X Series are electrically rated for 10 amps @ 125/250 VAC & 3 amps @ 480 VAC. Standard 3 & 6 pin terminal strips simplify installation. The L1X, T1X & T2X Series are rated NEMA 4, 7 & 9 and incorporate stainless steel temperature sensors to handle a wide range of media. Optional thermowells allow the sensor to work in pressurized vessels to 5000 psi. The L1X, T1X & T2X Series are UL listed & CSA approved & ATEX Certified for hazardous zones within the European Community.


General Specifications*

Accuracy: ±1% of mid-60% of full range. At constant ambient +/- 0.5% of full scale. (Knob indication is reference only)
Single Setting:
Dual Setting:
One (1) single pole double throw (SPDT) circuit.
Two (2) independent single pole double throw (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: 304 stainless steel
Electrical Connection: Single: 3-pin terminal strip
Dual: 6-pin terminal strip
Electrical Ratings: AC value at 75% power factor ?X10 amps 125, 250 volts AC, 3 amps 480 volts AC. Automatically reset by snap-action of switch.
Enclosure/Housing: Designed for hazardous locations: Class I, Division 1 & 2
NEMA 4, 7, 9 & IP65 tamper-proof external adjustment, enclosed terminal strip.
Local Mount: Immersion length 2-1/16 inches
Bulb & Capillary: 6 and 12 foot length standard.

UL (standard):
CSA (standard):

ATEX (optional):

Underwriters’ Laboratories, Inc. and Canadian Standard Assoc. are listed under Temperature indicating and regulating equipment, for use in hazardous locations, Class I, Groups B, C and D; Class II, Groups E, F and G.

File No. E58658, Guide No. XBDV
File No. LR34556,
Guide 400-E-O.8. Class 4868.
EX models are ATEX marked as follows:
CE 0081, ISSeP 08 ATEX024X
Ex II 2G D, Ex db IIC T6 Gb
Ex tb IIIC T80°C Db IP66
-40°C ≤ Tamb ≤ +75°C

Temperature Range: See product confi gurator
Adjustment: Tamper resistant external adjustment. Turn knob clockwise to increase setpoint. (Knob indication is reference only)
Standard Options/ Modifications: For thermowels, split nuts and union connections, see accessory pages.
Weight: Single – approximate 3.0 lbs. Dual – approximate 7.0 lbs.
Dual – approximate 7.0 lbs.

Wiring Code

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


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