131/141 Differential Pressure Switch

Brand: SOR Inc

131/141 differential pressure switches are robust field-mounted instruments. 

The 131/141 pressure sensing assembly is a diaphragm-piston combination. Switching elements are SPDT or DPDT.
Features
  • Built-In Quality - Rigid quality standards maintained from raw material to finished product.
  • Complete Product Line - Standard models with many options cover pressure range 5" wcd to psi: 180 (kPa: 1,241, bar: 12.4)
  • Instrument Quality - High repeatability, narrow dead band, negligible temperature effect and long-term stability
  • Field Adjustable - Excellent resolution of Set Points, self-locking adjustment, no special tools required
  • Construction - Rugged, long life, not critical to vibration, high static pressures, low differential pressures, excellent corrosion resistance to hostile environments

Specifications

Brand

Adjustment Type

  • Field Adjustable

Ambient Temperature Range

  • -34° to 108° C (-30° to 227° F)

Deadband

  • psi: 0.18 to 10.8 (kPa: 1.2 to 74.7, bar: 0.01 to 0.7)

Diaphragm Material

  • 316L Stainless Steel

Differential Pressure

  • psi: 0 to 300 (kPa: 0 to 2,100, bar: 0 to 21) - Max.

Electrical Connectors

  • Conduit Seal Connector with 17 feet Lead Wire Length

Electrical Rating

  • 0.3 A at 125 Vdc
  • 5 A at 250 Vac Resistive

Enclosure, Body Material

  • Carbon Steel

Materials of Construction

  • Mounting: Stainless Steel

Maximum System Pressure

  • psi: 1,850 (kPa: 12,500, bar: 125)

Mounting

  • Mounting Bracket

Name Plate, Tag Material

  • Stainless Steel

NPT Connection

  • Pressure Port: 1/4” NPT Female

O-Ring Material

  • EPR at -34° to 93° C (-30° to 200° F)

Pressure Type

  • Differential

Process Connection Material

  • 316 Stainless Steel

Repeatability

  • ± 1 % of Full Scale as Defined by ANSI/ISA S51.1

Seat / Seal Material

  • Seal: Ethylene Propylene (EPR)

Set Point - Decreasing

  • bar: 0.01 to 12.41
  • Inches WC: 5 to 300
  • kPa: 1.2 to 1241.1
  • psi: 0.18 to 180

Set Point - Increasing

  • bar: 0.01 to 12.41
  • Inches WC: 5 to 300
  • kPa: 1.2 to 1241.1
  • psi: 0.18 to 180

Switch Type

  • DPDT
  • SPDT

System Pressure

  • bar: 1.4 to 12.4
  • kPa: 137.9 to 1,241
  • psi: 20 to 180

Temperature Effect

  • Decreasing Set Point Shift: 5 psi/37.78° C (100° F) Average
  • Increasing Set Point Shift: 5 psi/37.78° C (100° F) Average
  • Set Point Shift: ± 1.5” WC/37.78° C (100° F)

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