Model 146

OEM Indicators

Model 146 – Our most affordable OEM diaphragm type indicator with a Full scale accuracy of ±5% combined with Differential pressure range of 0-5 PSID to 0-30 PSID. Model 146 is available with Plug-In DIN and Flat pack electrical switch options. Model 146 has a lower price point while still delivering exceptional performance.

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Product Features/Benefits

  • Competitively Priced
  • Rugged Diaphragm Type design Sensing Element
  • Weather Resistant (Electrical with DIN Connector) & Corrosion Resistant
  • Shatter Resistant Lens
  • Over-Range Protection, High over Low and Low over High
  • 1 Year Warranty
  • For complete model details See Bulletin_146.pdf

Specifications / Configuration

  • Dial Sizes available: Oval, Single Side or Dual Side: 1-1/4” x 2-1/4”
  • Differential Full Scale Ascending Accuracy ±5% (ASME B40.1 Grade D)
  • Dial Scale Range: 0-5 PSID to 0-30 PSID (0-0.35 bar to 0-2.0 bar)
  • Working Pressures up to 1000 PSIG (69 Bar)
  • Operating Temp -40°F to +200°F (-40°C to +93°C)
  • Weather Protection NEMA 4X / IP65 DIN Option Only
  • Material of Construction of Body – Aluminum or 316 Stainless Steel (Wetted Part)
  • Internal wetted parts-316 Stainless Steel Piston & Ceramic Magnet
  • Available with 1/8” FNPT Bottom or Back connections
  • Elastomers (O-rings) Buna-N, Viton, Silicone, Neoprene (25 PSID & below),and Ethylene Propylene
  • For complete specifications see: Specificationsheet_146.pdf

Common Applications

  • Filter Monitoring
  • Strainer Monitoring
  • Water System Applications
  • Refrigerant Filtration Systems
  • Compressed Air
  • Hydraulic
  • Heat Exchanger Pressure
  • Drop Monitoring

Mid-West Instrument Model 146 Plug-In DIN (non-adjustable) and Flat pack switches are available both adjustable and non-adjustable. The adjustable switch allows 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.
  • Available with Flat Pack case with  Flying Leads or with DIN IP65 / NEMA 4X Plug-in Connector.
    • SPDT 3W, 0.25 Amp, 125 VAC/VDC
    • SPST 60W, 3.0 Amp, 240 VAC/VDC
  • DIN Compression Plug seals on Cable OD.  We can match Plug to Cable OD.
  • Upon request CE Marked for Compliance with the Low Voltage   & RoHS Directives

Additional Options:

  • Mounting Holes

The Mid-West Advantage

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