Mid-West Instrument operates a Quality Management System which complies with the requirements of CSA B51-14 (certificate of conformance)

3-Color Dial

  • Cost Effective, Simple, rugged, compact design.
  • 3-Color, Green Clean / Yellow Change / Red Dirty Dial standard
  • Glass Reinforced Thermoplastic Gauge Front Is Standard
  • Weather resistant construction standard
  • Shatter Resistant Lens
  • Accuracy ±5% Full Scale(Ascending)
  • Operating Temp. -40° F to +200° F (-40°C to +93°C)
  • One year Limited Warranty on every gauge.

Mid-West Instrument's Differential Pressure Gauges, Switches & Transmitters Meet Global Demands

Mid-West Instrument, located in Sterling Heights, MI is one of the leading designers and manufacturers of differential pressure gauges and switches in the U.S. The firm's experienced engineers and technicians utilize the latest equipment for engineering, manufacturing and testing the firm's gauge and switch products.

Mid-West Instrument has been providing Differential Pressure Products since 1958. With a majority of our DP Gauges, Switches, Transmitters and Backflow Test kits manufactured in the state of Michigan USA. Our product Warranties range from One (1) Year to an industry leading Five (5) Year Warranty. Please visit product pages for specific warranty information.

Mid-West Instrument also provides Veris Flow Measurement Instruments with proven advanced DP Flow Measurement Technology. Whether your application calls for the Veris Verabar, Accelabar, or Mid-West Model 300 DELTA TUBE, you can count on Mid-West to supply the finest in Flow Measurement products.

Let Mid-West Instrument quote your
"DIAPHRAGM SEAL" application


Diaphragm seals use a flexible barrier, (the diaphragm) to isolate a differential pressure gauge, switch or transmitter sensor from the process media. This isolation eliminates many of the adverse effects the process poses to the differential pressure gauge. Use with Mid-West models 140 & 142 diaphragm type differential pressure gauges.

The right seal for your application:
In order to recommend a diaphragm seal, we will need basic process and application information. Please fill out the online Diaphragm Seal Worksheet. We typically provide a response within 48 hrs.

Learn more about diaphragm seals

The company offers:

  • Global Network of Representatives and Distributors
  • High Quality Products Backed by a 5 Year Warranty
  • OEM Design Capability
  • Custom Manufacturing
  • Private Labeling Capabilities
Browse our easy to use product matrix to find exactly what you are looking for.
Buy a Gauge - Add a Switch! Avoid the hassle — do it all at once.
The Advantage for Transmitters...
Differential Pressure Gauges for Cryogenic Applications. Drop in replacements for Barton, and Prime Measurement.
Mid-West Instrument’s 5 Year Product Warranty is the Best in the Industry.
Quick Reference Guide
Mid-west Instrument Catalog

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