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Series B1S, B2S, B1T, B2T


Barksdale's Bourdon Tube Pressure Switches offer instrument class accuracy, making them an ideal solution to your pressure control needs when accuracy is critical. Built-in over-travel stops allow for higher proof pressures than most other pressure switch technologies. Setpoints are easily adjusted via an internal adjustment screw. Available in single and dual configurations, Bourdon Tube Pressure Switches are adaptable for use in a wide range of industrial applications. A variety of limit switches is available to allow for a multitude of electrical switching conditions. For applications requiring a highly accurate switch in a highly durable package, Bourdon Tube Pressure Switches are the ideal solution



  • Diaphragm Seal Option Available
  • High accuracy
  • High pressure up to 18,000 psi
  • Tamper-proof external adjustment
  • Single and dual switching capability
  • Water tight housing versions available (NEMA 4)

Technical specifications

General Specifications*

Electrical Characteristics: All models incorporate Underwriters Laboratories, Inc. and CSA Listed single pole double throw snap-action switching elements.
Accuracy: ±1% of the adjustable range


Single pole double throw (SPDT) snap action; single or dual circuit

10 amp @ 125/250 VAC
3 amp @ 480 VAC
0.5 amp @ 24 VDC
Wetted Parts:
Process Fitting & Bourdon Tube:

316 series stainless steel
Anodized aluminum
Electrical Connection:
Stripped Model:
Housed Model:

21" Free Leads
Internal terminal strip via conduit connection
Enclosure Ratings:
Housed Model:

Pressure Connection: Housed models with proof pressure up to 7,200 psi and stripped models with proof pressure up to 6,000 psi; 1/4" NPT female; All higher pressure ranges: superpressure fitting for 1/4" O.D. tube.
UL/CSA (optional):

UL File E42816
Class 3231 02; File No. 022355-0.000
Temperature Range:

-40° to +165°F (-40° to +74°C)
Adjustment Instructions: Remove protective hex cap to remove adjustment screw.
Turn main unit adjustment screw clockwise to lower setpoint, counterclockwise to raise setpoint.
For optional adjustable actuation value (deadband) models, set the desired DECREASING setpoint first and then turn microswitch adjustment wheel counterclockwise to increase the amount of deadband until the desired INCREASING setpoint is achieved.
Options: -UL/CSA approval (max rating 300 VAC)
-Temperature stabilization and pre-cycle
-Cleaned for oxygen service
Shipping Weight:
Stripped Model:
Housed Model:

1.5 lbs. approximate
2.5 lbs. approximate
* See product confi gurator for additional options.

Wiring Code

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