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Series DP Double Bellows Differential Pressure Switch

Brand: Dwyer Instruments, LLC
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Does not ship to Washington, United States
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
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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
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Specifications

Brand

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
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Typical Applications

  • Accurate Switch Triggers in High Pressure Applications
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