Mid-West Instrument
Tel: (586) 254-6500 · Fax: (586) 254-6509
6500 Dobry Dr., Sterling Heights, Michigan 48314
1-800-648-5778 ../news.asp ../reps.asp ../literature.asp ../about.asp ../warranty.asp
Differential Pressure Diaphragm - Type Gauge & Switch - Model 142 Delta Meter


Model 522 3 Color Delta Meter

Model 522 3 Color Delta Meter

Model 522 3 Color Delta Meter

Literature Links

Product Bulletin




Instrument Installation

Typical Manifold Installation

The Mid-West Advantage:

Model 522
Common Applications
  • Filter/Strainer Monitoring
  • Compressed Air, Hydraulic, Refrigerant
  • Pump Performance Testing
  • Heat Exchanger Pressure Drop Monitoring
  • Water Treatment Applications
Product Features
  • 3-Color, Green Clean/Yellow Change/Red Dirty
  • DP Ranges from 0-5 PSD to 0-50 PSID
  • Elastomer Diaphragm Sensing Element
  • Up to 1000 PSIG Working Pressure (69 bar)
  • Gauge Housings available in Aluminum, 316/316L Stainless Steel and Acetal Plastic
  • Buna-N and Viton Elastomers
Product Features/Benefits

Model 522 Differential Pressure Gauge & Switch is a compact, weather resistant gauge for challenging DP Applications and installations when quickly identifying critical differential pressures are required. It is suitable for use in outdoor and "Hose Down" applications. The Rolling Diaphragm Sensing Element isolates the high and low side. Example: Used to determining the state of an in-line filter. Filtration systems require monitoring to maintain a level of performance specified by the manufacturer for the continued expectations of the end user. Colored bands allow you to quickly identify pressure drop across element. Divided into three sections, each clearly marked for ease of understanding. Model 522 is suited for filter applications, line loss, valve drop, and many other differential pressure applications where a simple indicator is needed. Used to indicate critical pressure drops or when to change or clean a filter. Model 522 is suited for use in Air, Gas, Dissimilar fluids, Wet Gas and process fluids with particulates present. Available with or without DIN Plug type switch

  • Simple Rugged Designs
  • Glass Reinforced Thermoplastic Gauge Front Is Standard
  • Weather Resistant & Corrosion Resistant Gauge Front
  • 1 Year Warranty


  • Differential Pressure Range 0-5 PSID to 0-50 PSID(3-Color Dials)
  • Accuracy ±5% of Full Scale (Acending)
  • Dial Size 2-1/2" Rd. (Standard)
  • Working Pressure:
    • 1000 PSI (69 bar)
  • Proof Pressure:
    • 2000 PSI (138 bar)
  • Material of Construction – Body Aluminum, 316 Stainless Steel, or Acetal
  • Materials of Construction - Internals 316 Stainless Steel, Elastomer Diaphragm & Acetal Components
  • Switch Option
    • Hermetically Sealed switch
    • DIN 43650/IP65/NEMA 4X Plug-in Connector (Compression Plug accepts 4.5 to 7mm cable)
    • Output: - SPST 60W, 3 amps, 240 VAC/VDC, Normally Open
  • CE Marked in Accordance With Low Voltage Directive

Special Features:

  • Standard: Panel Mounting, Front or Rear Panel, (2) 10-32 Mounting Holes on back of gauge body - 1.75" Apart x .330" Depth