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S-Series (Vacuum, Differential) Pressure Switch

Brand: ASCO
ASCO S-Series pressure switches consist of a switch unit and a transducer unit.
 
They can be ordered separately for customer stocking and/or field assembly or as a complete factory-assembled unit.
 
Switch S-Series pressure switch units incorporate the unique ASCO TRI-POINT alternating fulcrum balance plate to control the operation of one or more electrical snapaction swtiches.
 
The electrical snap-action switch together with the adjusting mechanism is a fully-tested, self-contained subassembly.
Features
  • Set point repeatability, ±1% of operating range
  • All wiring terminals, adjustments and visual scales are accessible from the front of the switch
  • Choice of general-purpose, watertight or explosion proof enclosures
  • Choice of fixed or full-range adjustable deadband
  • Choice of single or two-stage units
  • Manual reset units available
  • Mounts in any position
  • Rugged and vibration resistant
  • Visual adjustment scales in psi and bars
  • External adjusting nuts
  • Separate electrical, pressure and adjusting chambers
  • Wide selection of transducer wetted materials suitable for air, water, oil or corrosive fluids
  • Mix and match switch and transducer components for increased stock flexibility or to change pressure ranges in field
ASCO S-Series pressure switches consist of a switch unit and a transducer unit.
 
They can be ordered separately for customer stocking and/or field assembly or as a complete factory-assembled unit.
 
Switch S-Series pressure switch units incorporate the unique ASCO TRI-POINT alternating fulcrum balance plate to control the operation of one or more electrical snapaction swtiches.
 
The electrical snap-action switch together with the adjusting mechanism is a fully-tested, self-contained subassembly.
Features
  • Set point repeatability, ±1% of operating range
  • All wiring terminals, adjustments and visual scales are accessible from the front of the switch
  • Choice of general-purpose, watertight or explosion proof enclosures
  • Choice of fixed or full-range adjustable deadband
  • Choice of single or two-stage units
  • Manual reset units available
  • Mounts in any position
  • Rugged and vibration resistant
  • Visual adjustment scales in psi and bars
  • External adjusting nuts
  • Separate electrical, pressure and adjusting chambers
  • Wide selection of transducer wetted materials suitable for air, water, oil or corrosive fluids
  • Mix and match switch and transducer components for increased stock flexibility or to change pressure ranges in field
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Specifications

Brand

Ambient Temperature

  • -20° to 60° C (-4° to 140° F)

Diaphragm Material

  • Buna-N
  • Ethylene Propylene (EPR)
  • Fluorosilicone
  • Neoprene
  • Viton

Electrical Rating

  • 1/2 A Res. at 125 Vdc
  • 1/4 A Res. at 250 Vdc
  • 1/4 hp at 250 Vac
  • 1/8 hp at 125 Vac
  • 10 A Res. at 250 Vac
  • 15 A Res. at 125 Vac

Switch Type

  • SPDT

Enclosure, Body Material

  • 316 Stainless Steel
  • Aluminum

Approvals & Certifications

  • CSA
  • UL

Set Point - Increasing

  • bar: 0 to 27.58
  • inHg: -30 to 0
  • kPa: 0 to 2,758
  • psi: 0 to 400

Set Point - Decreasing

  • bar: 0 to 27.58
  • inHg: -30 to 0
  • kPa: 0 to 2,758
  • psi: 0 to 400

Process Connection Material

  • 303 Stainless Steel
  • 316 Stainless Steel
  • Aluminum
  • Brass

Pressure Range

  • bar: 0 to 1.034
  • inHg: 0 to 30
  • inH₂O: 0 to 400
  • kPa: 0 to 103.4
  • psi: 0 to 15

NPT Connection

  • 1/2" NPT Female
  • 1/4" NPT Female

Proof Pressure

  • bar: 1.034 to 3.447
  • kPa: 103.4 to 344.7
  • psig: 15 to 50
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