Model 220

Piston Type Gauges

Hazardous Locations Product

Class I, Division 1, Groups B, C, & D;  Class II, Division 1 Groups E, F & G
Class I Division 2, Groups E, F, & G;  Class II Division 2 Groups F & G

Ex d IIB + H2;  Ex tb IIIC  IP6X

  • Third Party Certifications for Hazardous Locations
    • CSA
    • UL
    • ATEX
    • IEC Ex
    • KOSHA  Ex IIB + H2
  • EU RoHS2 Compliant
  • Field Accessible Terminal Strip
  • 4-20 ma transmitter, Switch, and Relay Output Options
  •  Switch Outputs require no power to operate

Contact Us Today For Availability

Product Features/Benefits

  • Simple, Rugged, Compact Piston Type Design Sensing Element
  • Glass Reinforced Thermoplastic Dial case (Anodized Aluminum Dial Case Option available contact sales for more information)
  • Weather Resistant & Corrosion Resistant
  • Shatter Resistant Lens
  • Over-Range Protection, High over Low and Low over High
  • Terminal Strip Switch & Transmitter options
  • 5 Year Warranty
  • For complete model details See Bulletin_220.pdf

Specifications / Configuration

  • Dial Size available: 4-1/2”
  • Differential Full Scale Ascending Accuracy ±3/2/3% (ASME B40.1 Grade B)
  • Dial Scale Ranges: 0-5 PSID to 0-100 PSID (0-0.35 to 0-7.0 bar)
  • Available in a Variety of Dial Scales: Bar, Mbar, kPa, Kg/Cm2, Dual Scale etc.
  • Working Pressures up to 4000 PSI (275 Bar) ATEX/IECEx 3000 PSI (205 Bar)
  • Operating Temp -40°F (-40°C) to +185°F to (+85°C),
    -40°F (-40°C) to +160°F (+70°C) – For output option R (Relay Output),
    -20°F (-30°C) to +150°F (+65°C) – For output option 4-20 mA Transmitter
  • ¼-20 Mounting Holes in back of gauge body
  • Material of Construction of Body - 316 Stainless Steel Wetted Pressure containing body assembly
  • Internal wetted parts-316 Stainless Steel, Ceramic Magnet
  • Available with ¼” FNPT or ½” FNPT End connections Only
  • Elastomers (O-rings) Buna-N, Viton, Neoprene, and Ethylene Propylene (Perfluoroelastomer optional)
  • For complete specifications see: Specificationsheet_220.pdf

Common Applications

  • Filters
  • Strainers
  • Separators
  • Valves
  • Pumps

Switch Electrical Specs:

See one of the following Bulletins:  IM220 , IOM220_TRANS

Mid-West Instrument Hazardous Location switches are provided with a field wireable terminal strip. The terminal strip eliminates the need to add a costly explosion-proof junction box near the switch. Switch is easily adjustable allowing customer to set the switch within a defined adjustment span of range of the instrument. All configurations have a ½” FNPT conduit interface. Mid-West can also pre-set switch set point(s) upon customer request.  For ATEX options; Switches are CE marked per EU ATEX and RoHS Directive.

Mid-West Instrument 220 indicating / non-indicating differential pressure transmitter is a 2 wire loop powered microprocessor based 4-20 mA transmitter. The magnetic angle sensor & electronics senses the angle (relative to the transmitter sensor) of the magnet which moves linearly in the bore. Each transmitter is individually calibrated to the gauge using an 11 point calibration linearization technique.

  • No Power required to operate switches ; Relay Option Requires Power
  • 1-2 Independent adjustable Switches
  • Available Electrical Output Options
    • SPDT 3W, 0.25 Amp, 125 VAC/VDC
    • SPST 60W, 3.0 Amp, 240 VAC/VDC  (Normally Open)
    • SPST 60W, 3.0 Amp, 240 VAC/VDC  (Normally Closed)
    • SPST 60W, 3.0 Amp, 240 VAC/VDC  (1) Normally Open, (1) Normally Closed
    • SPDT 60W, 1.0 Amp, 240 VAC/VDC
    • DPDT Relay, 10.0 Amp @ 30 VDC 120/240 VAC
    • 4-20 mA Transmitter (8-28 VDC Loop Power) 2% Accuracy (20%-100% of scale, Ascending)
  • Electrical Enclosures Weather-Resistant
    • CSA & US – NEMA 4X Optional
    • ATEX IECEx – IP65

Hazardous Locations Certifications (RoHS Compliant)

  • CSA & UL Certified to US and Canadian standards.
  • CSA & UL Certified: Class I, Division 1, Groups B, C & D / Class II, Division 1, Groups E, F & G, Class I, Division 2, Groups A, B, C & D / Class II, Division 2, Groups F & G
  • Certified for ATEX / IECEx Ex d IIB + H2 Ex tb IIIC, IP65 (2900 PSI SWP)
  • KOSHA Certified

Additional Options:

  • Pipe Mounting Kit - 2" U-Bolt
  • Oxygen Cleaning
  • Maximum Follower Pointer
  • CRN – Canadian Registration Number

The Mid-West Advantage

“Piston Type” Hazardous Locations Product

Model No. Differential Pressure Range Accuracy Working Pressure Electrical Available Specifications Installation/ Operation Manual Electrical IOM Drawing
Model 120 0-5 PSID to 0-110 PSID ±3/2/3% Up to 6,000 PSI CE / LVD, RoHS Compliant, NEMA 4X, Flying Leads / DIN Connector, Class 1-Div. 1, Class 1-Div. 2
Model 121 0-5 PSID to 0-100 PSID ±3/2/3% Up to 6,000 PSI CE / LVD, RoHS Compliant, NEMA 4X,Terminal Strip, Class 1-Div. 2, 4-20mA Transmitter N/A
Model 220 0-5 PSID to 0-100 PSID ±3/2/3% Up to 4,000 PSI CE / ATEX / RoHS Compliant, KOSHA CERTIFIED, NEMA 4X, Terminal Strip, Class 1-Div. 1, Class 1-Div. 2, 4-20mA Transmitter N/A

“Diaphragm Type” Hazardous Locations Product

Model No. Differential Pressure Range Accuracy Working Pressure Electrical Available Specifications Installation/ Operation Manual Electrical IOM Drawing
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 N/A
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 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