Model 105 Bellow Type Differential Pressure Gauge & Switch

Brand: Mid-West Instrument

Model’s 105 (±1/2% or ± 1% Full Scale Accuracy) System pressure is applied to the internal volume of a bellows and mechanical linkage assembly. 

As pressure changes, the bellows and linkage assembly move to cause an electrical signal to be produced or to cause a gauge pointer to move. 

Model’s 105 assembly incorporates a bi-directional relief valve which provides over-pressure protection in both directions. 

When over-pressured from the high side, the valve is opened by a mechanical stop as the sensing element deflects to its maximum travel.
Features
  • Diaphragm Bellows design provides a simple, compact, accurate, direct acting, low range high accuracy differential pressure indicator
  • Easier and less expensive to service/repair than competitive units
  • Working pressures of 500, 1,500, 3,000, or 6,000 psiG (400 bar)
  • Housing materials: Aluminum, Brass, Carbon Steel, or 316L S.S
  • Internals: Stainless Steel Diaphragm Bellows
  • Available: Elastomers: Buna-N, Viton, Neoprene, Ethylene Propylene
  • Mechanical over-range protection high to low and low to high
  • Weather resistant case of Engineered Plastic / Shatter resistant acrylic lens
  • Panel Mounting Kit Standard 
  • Uni-directional or Bi-directional dials are readily available
  • Gauges are optionally available with one or two switches which offer’s the ability to have alarm or control

Specifications

Approvals & Certifications

  • CE
  • CRN
  • CSA
  • UL (C,US)

Diaphragm Material

  • Buna-N
  • Neoprene
  • Viton

Enclosure, Body Material

  • 316 Stainless Steel
  • 316L Stainless Steel
  • Aluminum
  • Brass
  • Carbon Steel

Environmental Protection

  • IP66
  • NEMA 4
  • NEMA 7

NACE & NIST

  • NACE MR-0175

NPT Connection

  • 1/4” NPT Female

Pressure Type

  • Differential

Set Point - Decreasing

  • Inches WC: 0 to 80
  • kPa: 0 to 206.8
  • mbar: 0 to 2,068
  • psid: 0 to 30

Set Point - Increasing

  • Inches WC: 0 to 80
  • kPa: 0 to 206.8
  • mbar: 0 to 2,068
  • psid: 0 to 30

Switch Type

  • 1-2 DPDT
  • 1-2 SPDT

System Pressure

  • bar: 0 to 413.7
  • kPa: 0 to 41,370
  • psig: 0 to 6,000

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