Series DP Double Bellows Differential Pressure Switch

Brand: Dwyer Instruments, LLC

Two opposing bellows combine maximum sensitivity and vibration resistance at a moderate cost in the Series DP differential pressure switches.

Both set and reset points are easily adjustable through non-interactive, externally accessible controls.

Visible setpoint indicators simplify changes. SPDT snap action switch, 316 stainless steel or brass bellows, flanged steel housing. Rated pressures to 600 psig. 

A wide variety of switches and circuit styles enables exactly the specific type of control function needed for any system. Mercury switches are a good choice for humid areas while snap switches are better able to resist vibration. 

Various operations possible include single adjustment - fixed deadband, double adjustment - adjustable deadband, manual reset (increasing or decreasing pressure) and two stage with each SPST or SPDT switch independently adjustable.

Standard enclosure is NEMA-1 style. Optional weatherproof construction is for outdoor use and explosion-proof enclosure meets requirements for Class I, Groups C & D; Class II, Groups E, F & G.
Features
  • Bellows switch design provides sensitivity to pressure changes but resists vibration preventing out of range switching
  • External access to set and rest controls makes for easy adjustments
  • Visible set point indicators simplify changes

Models matching criteria: 36
  • Deadband - Adjustable Deadband
  • Bellows Material - 316 Stainless Steel Bellows
  • Pressure Range - psid: 0 to 80 (bar: 0 to 5.516, kPa: 0 to 551.6)
  • Enclosure - Explosion-Proof Enclosure
100+ In Stock
$137.00 CAD
$10.00 Shipping
  • Deadband - Adjustable Deadband
  • Bellows Material - 316 Stainless Steel Bellows
  • Pressure Range - psid: 0 to 80 (bar: 0 to 5.516, kPa: 0 to 551.6)
  • Enclosure - Weatherproof Enclosure
100+ In Stock
$1,409.00 CAD
$10.00 Shipping
  • Deadband - Fixed Deadband
  • Bellows Material - 316 Stainless Steel Bellows
  • Pressure Range - psid: 0 to 30 (bar: 0 to 2.068, kPa: 0 to 206.8)
  • Enclosure - Weatherproof Enclosure
100+ In Stock
$1,990.00 CAD
$10.00 Shipping
  • Deadband - Fixed Deadband
  • Bellows Material - Brass Bellows
  • Pressure Range - psid: 0 to 30 (bar: 0 to 2.068, kPa: 0 to 206.8)
  • Enclosure - Explosion-Proof Enclosure
100+ In Stock
$127.00 CAD
$10.00 Shipping
  • Deadband - Fixed Deadband
  • Bellows Material - Brass Bellows
  • Pressure Range - psid: 0 to 10 (bar: 0 to 0.689, kPa: 0 to 68.94)
  • Enclosure - General-Purpose Enclosre
100+ In Stock
$1,424.00 CAD
$10.00 Shipping
  • Deadband - Adjustable Deadband
  • Bellows Material - 316 Stainless Steel Bellows
  • Pressure Range - psid: 0 to 20 (bar: 0 to 1.379, kPa: 0 to 137.9)
  • Enclosure - Explosion-Proof Enclosure
100+ In Stock
$594.00 CAD
$10.00 Shipping
  • Deadband - Adjustable Deadband
  • Bellows Material - Brass Bellows
  • Pressure Range - psid: 0 to 10 (bar: 0 to 0.689, kPa: 0 to 68.94)
  • Enclosure - Weatherproof Enclosure
100+ In Stock
$877.00 CAD
$10.00 Shipping
  • Deadband - Fixed Deadband
  • Bellows Material - 316 Stainless Steel Bellows
  • Pressure Range - psid: 0 to 20 (bar: 0 to 1.379, kPa: 0 to 137.9)
  • Enclosure - General-Purpose Enclosre
100+ In Stock
$2,055.00 CAD
$10.00 Shipping
  • Deadband - Fixed Deadband
  • Bellows Material - Brass Bellows
  • Pressure Range - psid: 0 to 20 (bar: 0 to 1.379, kPa: 0 to 137.9)
  • Enclosure - Explosion-Proof Enclosure
50+ In Stock
$292.00 CAD
$10.00 Shipping
  • Deadband - Adjustable Deadband
  • Bellows Material - 316 Stainless Steel Bellows
  • Pressure Range - psid: 0 to 30 (bar: 0 to 2.068, kPa: 0 to 206.8)
  • Enclosure - Weatherproof Enclosure
50+ In Stock
$293.00 CAD
$10.00 Shipping
  • Deadband - Fixed Deadband
  • Bellows Material - 316 Stainless Steel Bellows
  • Pressure Range - psid: 0 to 30 (bar: 0 to 2.068, kPa: 0 to 206.8)
  • Enclosure - Explosion-Proof Enclosure
50+ In Stock
$1,502.00 CAD
$10.00 Shipping
  • Deadband - Fixed Deadband
  • Bellows Material - 316 Stainless Steel Bellows
  • Pressure Range - psid: 0 to 80 (bar: 0 to 5.516, kPa: 0 to 551.6)
  • Enclosure - Weatherproof Enclosure
50+ In Stock
$1,884.00 CAD
$10.00 Shipping
  • Deadband - Fixed Deadband
  • Bellows Material - 316 Stainless Steel Bellows
  • Pressure Range - psid: 0 to 20 (bar: 0 to 1.379, kPa: 0 to 137.9)
  • Enclosure - Weatherproof Enclosure
50+ In Stock
$1,136.00 CAD
$10.00 Shipping
  • Deadband - Adjustable Deadband
  • Bellows Material - 316 Stainless Steel Bellows
  • Pressure Range - psid: 0 to 30 (bar: 0 to 2.068, kPa: 0 to 206.8)
  • Enclosure - Explosion-Proof Enclosure
50+ In Stock
$2,158.00 CAD
$10.00 Shipping
  • Deadband - Adjustable Deadband
  • Bellows Material - Brass Bellows
  • Pressure Range - psid: 0 to 10 (bar: 0 to 0.689, kPa: 0 to 68.94)
  • Enclosure - Explosion-Proof Enclosure
50+ In Stock
$1,054.00 CAD
$10.00 Shipping
  • Deadband - Fixed Deadband
  • Bellows Material - 316 Stainless Steel Bellows
  • Pressure Range - psid: 0 to 30 (bar: 0 to 2.068, kPa: 0 to 206.8)
  • Enclosure - General-Purpose Enclosre
50+ In Stock
$851.00 CAD
$10.00 Shipping
  • Deadband - Fixed Deadband
  • Bellows Material - Brass Bellows
  • Pressure Range - psid: 0 to 20 (bar: 0 to 1.379, kPa: 0 to 137.9)
  • Enclosure - Weatherproof Enclosure
50+ In Stock
$1,205.00 CAD
$10.00 Shipping
DWYER Differential Pressure Switch, 316 SST Bellows, Range 0-20 psid (0-1.4 bar), Max. Pressure 100 psig (6.9 bar), Min. Deadband 3.0 psid (.21 bar). view more
  • Deadband - Adjustable Deadband
  • Bellows Material - 316 Stainless Steel Bellows
  • Pressure Range - psid: 0 to 20 (bar: 0 to 1.379, kPa: 0 to 137.9)
  • Enclosure - General-Purpose Enclosre
50+ In Stock
$1,420.00 CAD
$10.00 Shipping
  • Deadband - Adjustable Deadband
  • Bellows Material - Brass Bellows
  • Pressure Range - psid: 0 to 20 (bar: 0 to 1.379, kPa: 0 to 137.9)
  • Enclosure - Weatherproof Enclosure
50+ In Stock
$2,214.00 CAD
$10.00 Shipping
  • Deadband - Adjustable Deadband
  • Bellows Material - Brass Bellows
  • Pressure Range - psid: 0 to 20 (bar: 0 to 1.379, kPa: 0 to 137.9)
  • Enclosure - Explosion-Proof Enclosure
50+ In Stock
$1,814.00 CAD
$10.00 Shipping
  • Deadband - Fixed Deadband
  • Bellows Material - Brass Bellows
  • Pressure Range - psid: 0 to 30 (bar: 0 to 2.068, kPa: 0 to 206.8)
  • Enclosure - Weatherproof Enclosure
50+ In Stock
$390.00 CAD
$10.00 Shipping
  • Deadband - Adjustable Deadband
  • Bellows Material - 316 Stainless Steel Bellows
  • Pressure Range - psid: 0 to 20 (bar: 0 to 1.379, kPa: 0 to 137.9)
  • Enclosure - Weatherproof Enclosure
50+ In Stock
$1,897.00 CAD
$10.00 Shipping
DWYER Differential Pressure Switch, Brass Bellows, Range 0-30 psid (0-2.1 bar), Max. Pressure 300 psig (20.7 bar), Min. Deadband 6.0 psid (.41 bar). view more
  • Deadband - Adjustable Deadband
  • Bellows Material - Brass Bellows
  • Pressure Range - psid: 0 to 30 (bar: 0 to 2.068, kPa: 0 to 206.8)
  • Enclosure - General-Purpose Enclosre
50+ In Stock
$1,452.00 CAD
$10.00 Shipping
  • Deadband - Fixed Deadband
  • Bellows Material - 316 Stainless Steel Bellows
  • Pressure Range - psid: 0 to 80 (bar: 0 to 5.516, kPa: 0 to 551.6)
  • Enclosure - General-Purpose Enclosre
50+ In Stock
$526.00 CAD
$10.00 Shipping
DWYER Differential Pressure Switch, Brass Bellows, Range 0-10 psid (0-0.7 bar), Max. Pressure 50 psig (3.5 bar), Min. Deadband 1.5 psid (.10 bar). view more
  • Deadband - Adjustable Deadband
  • Bellows Material - Brass Bellows
  • Pressure Range - psid: 0 to 10 (bar: 0 to 0.689, kPa: 0 to 68.94)
  • Enclosure - General-Purpose Enclosre
50+ In Stock
$758.00 CAD
$10.00 Shipping
  • Deadband - Adjustable Deadband
  • Bellows Material - Brass Bellows
  • Pressure Range - psid: 0 to 30 (bar: 0 to 2.068, kPa: 0 to 206.8)
  • Enclosure - Weatherproof Enclosure
50+ In Stock
$361.00 CAD
$10.00 Shipping
  • Deadband - Fixed Deadband
  • Bellows Material - 316 Stainless Steel Bellows
  • Pressure Range - psid: 0 to 20 (bar: 0 to 1.379, kPa: 0 to 137.9)
  • Enclosure - Explosion-Proof Enclosure
25+ In Stock
$2,153.00 CAD
$10.00 Shipping
DWYER Differential Pressure Switch, 316 SST Bellows, Range 0-30 psid (0-2.1 bar), Max. Pressure 300 psig (20.7 bar), Min. Deadband 6.0 psid (.41 bar). view more
  • Deadband - Adjustable Deadband
  • Bellows Material - 316 Stainless Steel Bellows
  • Pressure Range - psid: 0 to 30 (bar: 0 to 2.068, kPa: 0 to 206.8)
  • Enclosure - General-Purpose Enclosre
25+ In Stock
$1,376.00 CAD
$10.00 Shipping
DWYER Differential Pressure Switch, Brass Bellows, Range 0-20 psid (0-1.4 bar), Max. Pressure 100 psig (6.9 bar), Min. Deadband 2.5 psid (.17 bar). view more
  • Deadband - Adjustable Deadband
  • Bellows Material - Brass Bellows
  • Pressure Range - psid: 0 to 20 (bar: 0 to 1.379, kPa: 0 to 137.9)
  • Enclosure - General-Purpose Enclosre
25+ In Stock
$1,911.00 CAD
$10.00 Shipping
  • Deadband - Adjustable Deadband
  • Bellows Material - Brass Bellows
  • Pressure Range - psid: 0 to 30 (bar: 0 to 2.068, kPa: 0 to 206.8)
  • Enclosure - Explosion-Proof Enclosure
25+ In Stock
$1,744.00 CAD
$10.00 Shipping
  • Deadband - Fixed Deadband
  • Bellows Material - Brass Bellows
  • Pressure Range - psid: 0 to 10 (bar: 0 to 0.689, kPa: 0 to 68.94)
  • Enclosure - Explosion-Proof Enclosure
25+ In Stock
$1,847.00 CAD
$10.00 Shipping
  • Deadband - Fixed Deadband
  • Bellows Material - Brass Bellows
  • Pressure Range - psid: 0 to 10 (bar: 0 to 0.689, kPa: 0 to 68.94)
  • Enclosure - Weatherproof Enclosure
25+ In Stock
$1,417.00 CAD
$10.00 Shipping
DWYER Differential Pressure Switch, 316 SST Bellows, Range 0-80 psid (0-5.5 bar), Max. Pressure 600 psig (41.4 bar), Min. Deadband 20 psid (1.4 bar). view more
  • Deadband - Adjustable Deadband
  • Bellows Material - 316 Stainless Steel Bellows
  • Pressure Range - psid: 0 to 80 (bar: 0 to 5.516, kPa: 0 to 551.6)
  • Enclosure - General-Purpose Enclosre
25+ In Stock
$2,224.00 CAD
$10.00 Shipping
  • Deadband - Fixed Deadband
  • Bellows Material - Brass Bellows
  • Pressure Range - psid: 0 to 20 (bar: 0 to 1.379, kPa: 0 to 137.9)
  • Enclosure - General-Purpose Enclosre
23 In Stock
$553.00 CAD
$10.00 Shipping
  • Deadband - Fixed Deadband
  • Bellows Material - 316 Stainless Steel Bellows
  • Pressure Range - psid: 0 to 80 (bar: 0 to 5.516, kPa: 0 to 551.6)
  • Enclosure - Explosion-Proof Enclosure
17 In Stock
$2,241.00 CAD
$10.00 Shipping
  • Deadband - Fixed Deadband
  • Bellows Material - Brass Bellows
  • Pressure Range - psid: 0 to 30 (bar: 0 to 2.068, kPa: 0 to 206.8)
  • Enclosure - General-Purpose Enclosre
9 In Stock
$95.00 CAD
$10.00 Shipping

Specifications

Adjustment Type

  • Field Adjustable

Approvals & Certifications

  • CE
  • cUL

Conduit Connection

  • 1/2” Conduit Hub
  • 1/2” Hole for Conduit Hub
  • 3/4” NPT Female

Deadband, Approximate

  • bar: 0.03 to 0.41
  • bar: 0.10 to 1.37
  • kPa: 10 to 137
  • kPa: 3.44 to 41.4
  • psid: 0.5 to 6.0
  • psid: 1.5 to 20

Electrical Connectors

  • Screw Terminal

Electrical Rating

  • 15 A at 120/240 Vac

Enclosure, Body Material

  • Flanged Steel

Maximum System Pressure

  • bar: 41.4
  • kPa: 4,137
  • psi: 600

NPT Connection

  • 1/4” NPT Male
  • 1/8” NPT Female

Operating Temperature

  • -23° to 82° C (-10° to 180° F)

Set Point - Decreasing

  • bar: 0 to 5.516
  • kPa: 0 to 551.6
  • psi: 0 to 80

Set Point - Increasing

  • bar: 0 to 5.516
  • kPa: 0 to 551.6
  • psi: 0 to 80

Switch Type

  • SPDT

System Pressure

  • bar: 3.447 to 41.37
  • kPa: 344.7 to 4,137
  • psi: 50 to 600

Wetted Materials

  • 316 Stainless Steel
  • Brass

  • Accurate Switch Triggers in High Pressure Applications

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