DPD1T, DPD2T Series

  • High reliability
  • Dual switching capability
  • High accuracy
  • Tamper-proof external adjustment
  • NEMA 4
  • Diaphragm Seal Option Available

Barksdale's Housed Diaphragm Differential Pressure Switches offer superior accuracy in a robust package, making them an ideal solution to your industrial pressure control needs. These switches are ideal applications requiring water-tight, NEMA 4 housings, a covered terminal strip and tamper-proof external adjustment. (Unit can be factory set upon request.) With pressure ranges up to 150 psi, these housed diaphragm differential pressure switches are suitable for use in either positive pressure or vacuum applications. Available in single-circuit and dual-circuit models. These switches feature a durable, die-cast aluminum enclosure. For applications requiring a highly accurate switch in a durable package, Barksdale's Housed Diaphragm Differential Pressure Switches are the ideal choice.


General Specifications*

Electrical Characteristics: All models incorporate Underwriters Laboratories, Inc. and CSA Listed single pole double throw snap-action switching elements.
Accuracy: ± 0.5% of the adjustable range
SPDT snap action; single or dual circuit
10 amps @ 125/250 VAC; 3 amps @ 480 VAC (Class A or H limit switch). Consult product configurator for ratings of optional limit switches.
Wetted Parts:
Other Parts:
17-7 PH stainless steel
Die-cast aluminum anodized
Nickel plated aluminum 300 series stainless steel
Electrical Connection: Screw terminals on covered terminal strip through 1/2″ NPT conduit fitting
Enclosure Ratings: NEMA 4
Pressure Connection: 1/8″ NPT female high + low
PED (European):
Compliant to PED 97/23/EC
Temperature Range:
-65°F to +165°F (-54°C to +74°C)
Adjustment Instructions:
Pressure:Vacuum Differential:
Turn adjustment screw clockwise to decrease pressure difference; counterclockwise to increase pressure difference
Turn adjustment screw counterclockwise to decrease vacuum difference; clockwise to increase vacuum difference
Options: -Factory pre-set
-NEMA 4X enclosure
Shipping Weight: Single & dual – approximate 3.50 lbs.
* See product confi gurator for additional options.

Wiring Code

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


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