Pressure Measurement

Differential Pressure Gauge

120 Series (Piston Type)

midwest 120 series differential pressure gauge


Midwest 120 Series Differential Pressure Gauge is a piston type pressure gauge that measures differential pressure through the movement of a floating piston magnet against a calibrated spring. The gauge pointer, outside the pressure housing, follows the movement of the piston magnet and indicates differential pressure.

  • Midwest 120 Series Piston Type Differential Pressure Gauge has a simple, rugged, compact design.
  • More cost effective and more accurate than using two pressure gauges in monitoring differential pressure.
  • Weather-resistant construction standard.
  • Shatter resistant lens.
  • Midwest 120 Series Differential Pressure Gauge can use in measuring the pressure drop across filters, strainers, separators, valves, pumps, chillers, etc., and for local flow indication and control.

Technical Details

Accuracy+/- 2% F.S Ascending (Aluminum & SS material)
+/- 5% F.S Ascending (Monel & Aluminum bronze material)
Working Pressure6000 P.S.I.G (Aluminum & SS material)
5000 P.S.I.G (Monel & Aluminum bronze material)
MaterialAluminum (SS piston), SS316 (SS piston), Monel and Aluminum bronze body
Dial Size2 ½” & 4 ½” Round Uni-Directional,
3 ½” Round Uni-Directional anod. Aluminum housing assembly
4 ½” Round Uni-Directional anod. Aluminum housing assembly
SealsBuna-N, Viton, Neoprene, Teflon, Ethylene Propylene or Perfluoroelastomer
Connection1/4″ FNPT Back Connections (Standard)
1/4″ FNPT End Connections
1/4″ FNPT Bottom Connections
1/2″ FNPT End Connections
7/16″ – 20 Str.Thd.O-Ring Port (Back Connections)
1/2″ FNPT Stainless Steel Adaptors (back or bottom only)