Model 522
(OEM)

Diaphragm Type

Differential Pressure Gauges & Switches

Model 522_OEM – Mid-West Instrument rolling diaphragm type gauge is a very competitively price gauge/switch. Model 522 Differential Pressure Gauge & Switch is a compact and weather resistant gauge for challenging DP Applications and installations. Specific configurations are  suitable for use in outdoor and “Hose Down” applications. Available with our popular plug-in DIN connector switch option or Flat Pack, both in a SPDT and SPST electrical option. The model 522 is available with a Full Scale Accuracy of ±5% (0-5 PSID to 0-50 PSID)

NOTE: Reverse pressure should be avoided.

Contact Us Today For Availability

Product Features/Benefits

  • Simple Rolling Diaphragm Design
  • Glass Reinforced Thermoplastic Dial case (Panel Mountable)
  • Weather Resistant (Specific Configurations) & Corrosion Resistant
  • Shatter Resistant Lens
  • Over-Range Protection, High over Low to 200 PSID
  • 1 Year Warranty
  • For complete model details See Bulletin_522_OEM.pdf

Specifications / Configuration

  • Dial Sizes available: 0.80” and 2-1/2” weatherproof
  • Dial Scale Ranges: 0-5 PSID to 0-50 PSID (0-.35 bar to 0-3.5 bar)
  • Differential Full Scale Ascending Accuracy ±5% (ASME B40.1 Grade D)
  • Working Pressures up to 1000 PSIG (200 Bar)
  • Operating Temp -40°F to +200°F (-40°C to +93°C)
  • Weather Protection NEMA 4X (DIN Connector Option)
  • Material of Construction of Body - Aluminum, 316/316L Stainless Steel, and Acetal (Wetted Part)
  • Internal wetted parts-316 Stainless Steel, Ceramic Magnet and Acetal components
  • ¼” FNPT End Connections only
  • Elastomers (O-ring and Diaphragm Materials) Buna-N and Viton®.

Common Applications

  • Filter Monitoring
  • Strainer monitoring
  • Monitoring, Compressed Air
  • Hydraulic
  • Refrigerant
  • Pump Performance Testing
  • Heat Exchanger Pressure Drop Monitoring
  • Water Treatment Applications.

Switch Features:

  • Switches are optional
  • Hermetically Sealed Switch Outputs: 3 amps in SPST and 0.25 Amp in SPDT configuration.
  • DIN Connector Switch Adjustable from 40%-95% (SPST) of Range &  25%-75% (SPDT) of Range
  • Up to 240 VAC/VDC voltage ratings
  • Available with Flat Pack case with Jacketed Flying Leads or with DIN IP65 / NEMA 4X Plug-in Connector.
  • Optional Switch Set Feedback Decal
  • Switch Location Top or Bottom
  • CE Marking for Compliance with the Low Voltage  & RoHS Directives is available upon request.Contact Factory for additional Customization

The Mid-West Advantage

Model 522Documents

OEM Indicators “Piston Type”

Model No. Differential Pressure Range Accuracy Working Pressure Electrical Available Specifications Installation/ Operation Manual Electrical IOM Drawing
Model 126 0-5 PSID to 0-20 PSID ±5% 3,000 PSI Available CE Marked to LVD & RoHS N/AN/A
Model 127 0-25 PSID to 0-100 PSID ±5% 3,000 PSI Available CE Marked to LVD & RoHS Directives N/AN/A

OEM Indicators “Diaphragm Type”

Model No. Differential Pressure Range Accuracy Working Pressure Electrical Available Specifications Installation/ Operation Manual Electrical IOM Drawing
Model 146 0-3 PSID (0-50" H2O) to 0-30 PSID ±5% 1,000 PSI Electrical Enclosures Weather-Resistant, NEMA 4X N/AN/A
Model 444 0-5 PSID to 0-30 PSID ±5% 300 PSI None available N/AN/AN/A
Model 522OEM 0-5 PSID to 0-50 PSID ±5% 1,000 PSI Available CE Marked to LVD & RoHS Directives, SPST & SPDT Switches N/AN/AN/AN/A
Model 555Tri-Color 0-3.5 PSID to 0-43 PSID ±5% 300 PSI Not Available N/AN/A