Model 140 Diaphragm Type Differential Pressure Gauge & Switch

Brand: Mid-West Instrument

Model 140 Diaphragm type DP Gauge provides outstanding capabilities not previously available in a modestly priced differential pressure gauge/switch.
Features
  • Total separation of high and low pressures by a Convoluted Elastomer Diaphragm
  • Over range protection to full rated working pressure
  • Body Materials: Aluminum, Brass or 316L stainless steel Hastelloy available
  • Internal metal parts 316 stainless steel
  • ¼" Female NPT & ½" Female NPT Process Connections
  • Sensor magnetically coupled to the indicating pointer and optional switches
  • Weather-resistant construction standard
  • Shatter resistant acrylic lens
  • Variety of Dial type and Sizes: 2-1/2", 3-1/2" & 4-1/2"
  • DP Ranges available in: Inches H2O, psid, bar, and kPa
  • Available with Square Root dials for flow measurement
  • Multiple mounting options available
  • Temperature Limits: -40° to 200°F (-40° to 93°C)

Specifications

Accuracy

  • 0 to 15 psid to 0 to 100 psid: ± 3/2/3 %
  • 0 to 50” H₂O to 0 to 399” H₂O: ± 5 %

Approvals & Certifications

  • CE
  • CRN
  • CSA (C,US)
  • UL (C,US)

Diaphragm Material

  • Buna-N
  • Ethylene Propylene (EPR)
  • Silicone
  • Viton

Enclosure, Body Material

  • 316 Stainless Steel
  • 316L Stainless Steel
  • Aluminum
  • Brass
  • Engineered Plastic Housing

Environmental Protection

  • IP66
  • NEMA 4X
  • NEMA 7

NACE & NIST

  • NACE MR-0175

NPT Connection

  • 1/2” NPT Female
  • 1/4” NPT Female

Set Point - Decreasing

  • bar: 0 to 7
  • Inches WC: 0 to 2,768
  • kPa: 0 to 700
  • psi: 0 to 100

Set Point - Increasing

  • bar: 0 to 7
  • Inches WC: 0 to 2,768
  • kPa: 0 to 700
  • psi: 0 to 100

Switch Type

  • 1 or 2 - SPDT 3 W, 125 Vac/dc, 0.25 A
  • 1 or 2 - SPST (Normally Open) 25 W, 240 Vac/dc, 0.5 A

System Pressure

  • bar: 0 to 200
  • kPa: 0 to 20,000
  • psig: 0 to 3,000

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