Mid-West Instrument
Made in the USA
Tel: (586) 254-6500 · Fax: (586) 254-6509
6500 Dobry Dr., Sterling Heights, Michigan 48314
1-800-648-5778
Differential Pressure Piston Type Gauge & Switches - Model 120
Model 121
Model 121 back
Literature Links

Product Bulletin Bulletin_121_11.pdf

Installation/Operation

im121elec.pdf

Instrument Installation
Recommendations

install.pdf
Typical Manifold Installation

The Mid-West Advantage:

Model 121 "Filter Minder"
Common Applications
  • Filter/Strainer Monitoring
  • Compressed Air
  • Hydraulic
  • Refrigerant
  • Pump Performance Testing
  • Heat Exchanger Pressure Drop Monitoring
Product Features
  • DP Ranges from 0-5 PSID to 0-110 PSID (0.35 to 7.0 bar)
  • Piston Sensing Element
  • Working Pressure up to 6000 PSIG (400 bar)
  • Over-Range Protection, High over Low and Low over High
  • Gauge Housings available in Aluminum, 316/316L Stainless Steel.
  • Wide Range of Elastomers
Product Features/Benefits
  • Simple Rugged Designs
  • Glass Reinforced Thermoplastic Gauge Front Is Standard
  • Weather Resistant & Corrosion Resistant Gauge Front
  • Shatter Resistant Lens
  • 5 Year Warranty

Specifications:

  • Differential Pressure Range 0-5 PSID to 0-110 PSID (0-0.35 to 0-7.0 bar)
  • Available in a Variety of Equivalent Ranges & Scales
  • Accuracy ±2%*
  • Operating Temp -40ºF to +200ºF (-40ºC to +93ºC)
  • Dial Size 2-1/2" Round (Standard), 3-1/2" Round (Optional), 4-1/2" Round (Optional)
  • Working Pressure 6000 PSIG (400 bar)
  • Material of Construction of Body - Aluminum, 316/316L Stainless Steel.
  • Materials of Construction of Internals - 316 Stainless Steel (Standard)
  • Switch Options
    • SPDT 3W, 0.25 Amp, 125 VAC ( 15-95% F.S.) adjustability
    • SPST 60W, 3.0 Amp, 240 VAC ( 20-95% F.S.) adjustability
  • Electrical Enclosures Weather-Resistant, NEMA 4X, IP65
  • Transmitter Options

Special Features:
  • Over-range Protection Full to Maximum Working Pressure
  • Panel Mounting Standard
  • Pipe Mounting Kit Optional - 2" U-Bolt
  • Wall Mounting Optional - Rear Mount
  • NACE Compliance Optional
  • Seismic Compliance Contact Factory
  • Typical Manifold Installation