• Pressure and vacuum differential switch
  • High accuracy diaphragm switch
  • Calibrated dial for easy setpoint adjustment
  • Factory preset or field adjustable
  • Diaphragm Seal Option Available

Barksdale's CDPD1H and CDPD2H Housed Diaphragm Differential Pressure Switches are the answer for pressure control applications requiring tamper proof external adjustment and environments which require water-tight NEMA 4 housings. These pressure switches are available in single or dual control settings for both positive pressure and vacuum models, to 150 psi. The switches may be wired normally open or normally closed through a 3/4"-14 NPT conduit connection to free leads. All models feature calibrated dials for adjusting setpoints in units can be factory set upon request. For applications requiring a highly reliable, accurate switch in a durable package, Barksdale's CDPD1H and CDPD2H Housed Diaphragm Differential Pressure Switches are the ideal choice.


General Specifications*

Electrical Characteristics: All models incorporate Underwriters´ Laboratories, Inc. listed single pole double throw snap-action switching elements. Switches may be wired “normally open” or “normally closed”.
Accuracy: ± 0.5% of the adjustable range
SPDT single or dual circuit
10 amps @ 125/250 VAC; 3 amps @ 480
VAC (Class A or H limit switch)
Wetted Parts:
Other Parts:
17-7 PH stainless steel
Die-cast aluminum anodized
Nickel painted aluminum
300 series stainless steel
Electrical Connection: Free leads approximately 18″ long No. 16 AWG standard AWN 105/c wire through 3/4″ conduit connection.
Enclosure Ratings: Housed watertight housing (NEMA 4)
Tamper-proof external adjustment.
Pressure Connection: 1/8″ NPT female.
UL listed; File # E42816
CSA listed under guide 380-W-1.16, Class 3231, File # 22355
Temperature Range:
-65°F to +165°F (-54° 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: -NEMA 4X
-Cleaned for oxygen service
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
Ground Green


There are no reviews yet.

Be the first to review “CDPD1H, CDPD2H, VCDPD1H, VCDPD2H Series”

Your email address will not be published. Required fields are marked *

Contact Us Directly

  • Contact Details