Model 522C
(3-Color Dial)

Rolling Diaphragm Type

Differential Pressure Gauge & Switch

Model 522 – Mid-West Instrument Tri-Color Dial (Clean/Change/Dirty) rolling diaphragm type gauge is a very competitively price gauge/switch. Available with our popular plug-in DIN connector switch option, both in a SPDT and SPST electrical option. Model 522 is available with a Full scale accuracy of ±5% (0-5 PSID to 0-50 PSID).

Note: Reverse Pressure should be avoided.

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Product Features/Benefits

  • Simple Rolling Diaphragm Design
  • Glass Reinforced Thermoplastic Dial Case (Panel Mountable)
  • Weather Resistant (Specific Configurations) & Corrosion Resistant
  • Shatter Resistant Lens
  • Plug-In Din Connector Switch Option
  • 1 Year Warranty
  • For complete model details See Bulletin_522C.pdf

Specifications / Configuration

  • Dial Sizes available: 2-1/2” Diameter
  • Dial Scale Ranges: 0-5 PSID to 0-50 PSID
  • 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
  • Material of Construction of Body - Aluminum, Acetal Plastic and 316/316L Stainless Steel, (Wetted Part)
  • Internal Wetted Parts-316 Stainless Steel, Ceramic Magnet
  • ¼” FNPT End Connections Only
  • Elastomers (O-ring and Diaphragm Materials) Buna-N and Viton
  • Maximum Over-range protection : 200 PSID (14 bar) - High over Low

Common Applications

  • Filter & Strainer Monitoring

Switch Electrical Specifications:

See Electrical   Installation and Operation manual

Mid-West Instrument switches are mechanically adjustable allowing customer to set the switch within a defined adjustment span of range of the instrument. Mid-West can also pre-set switch set point(s) upon customer request.

  • 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
    • SPDT 3W, 0.25 Amp, 125 VAC/VDC
    • SPST 60W, 3.0 Amp, 240 VAC/VDC
  • Available with Flat Pack case with Jacketed Flying Leads or with DIN IP65 / NEMA 4X Plug-in Connector.
    • DIN Compression Plug accepts and seals on 4.5 – 7 mm OD cable)
  • Switch Location Top Only
  • CE Marked for Compliance with the Low Voltage (Double Insulation)  & RoHS Directives.

Additional Options:

  • No additional options as standard are available. Please contact your sales coordinator for special requirements.

The Mid-West Advantage

Model 522CDocuments

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“Diaphragm Type” Gauges with Electrical Optional

Model No. Differential Pressure Range Accuracy Working Pressure Electrical Available Specifications Installation/ Operation Manual Electrical IOM Drawing
Model 114 0-0.72 PSID (0-20" H20) to 0-20 PSID (0-600" H2O)
Tank Level Applications		 ±2% 1000 PSI CE / LVD, RoHS Compliant, NEMA 4X, 4-20mA Transmitter
Model 130 0-5" H2O to 0-15 PSID (0-400" H2O) 0-5" H2O to 0-9.9" H2O
±5%
0-10" H2O to 0-15 PSID
±3/2/3%		 Up to 500 PSI CE / LVD, RoHS Compliant, NEMA 4X, Class 1-Div. 1
Model 140 0-50" H2O to 0-100 PSID 0-50" H2O to 0-399" H2O
±5%
0-15 PSID to 0-100 PSID
±3/2/3%		 Up to 3,000 PSI CE / LVD, RoHS Compliant, NEMA 4X, Terminal Strip, Class 1-Div. 1, Class 1-Div. 2, 4-20mA Transmitter
Model 142 0-20" H2O to 0-25 PSID ±3/2/3% Up to 3,000 PSI CE / LVD, RoHS Compliant, NEMA 4X, Terminal Strip, Class 1-Div. 2, 4-20mA Transmitter
Model 522 0-5 PSID to 0-50 PSID ±5% 1,000 PSI CE / LVD, RoHS Compliant N/A

Electrical “Diaphragm Type” Gauges

Model No. Differential Pressure Range Accuracy Working Pressure Electrical Available Specifications Installation/ Operation Manual Electrical IOM Drawing
Model 240 0-20" H2O to 0-100 PSID ±3/2/3% Up to 1500 PSI CE / ATEX / RoHS Compliant CSA, UL & KOSHA CERTIFIED, NEMA 4X, Terminal Strip, Class 1-Div. 1, Class 1-Div. 2, 4-20mA Transmitter N/A
Model 700 / 710 / 715 0-5 PSID to 0-300 PSID ±0.50% 2,900 PSI 2-Wire
4-20 mA Transmitter 15-28 VDC, LCD = 4-20 mA Transmitter 18-28 VDC, LED = 4-20 mA Transmitter 20-28 VDC
3 Wire
15-28 VDC/1-5 VDC, 15-28 VDC/0-5 VDC, 15-28 VDC/0-10 mADC, 15-28 VDC/0-20 mADC, 15-28 VDC/0-10 VDC 		N/A

“Indicator”  Style Diaphragm Type Gauges

Model No. Differential Pressure Range Accuracy Working Pressure Electrical Available Specifications Installation/ Operation Manual Electrical IOM Drawing
Model 522C3-Color Dial 0-5 PSID to 0-50 PSID ±5% 1,000 PSI CE / LVD, RoHS Compliant N/AN/A
Model 555A3-Color Dial 0-3.5 PSID to 0-43 PSID ±5% 300 PSI Not Available N/AN/AN/A