Mid-West Instruments

Mid-West Instruments manufactures and provides differential pressure gauges and switches as well as Backflow test kits. Based in Michigan, all of MidWest Instruments are manufactured in the USA.

Calibration Services

McIntosh Controls is an Official Calibration & Repair Center for MidWest Instruments. We can calibrate your back flow test kits typically with in 3-5 days. Faster service is offered but please let us know.

In addition to calibration and repair service we also sell:

Back Flow Test Kits

The Mid-West Instrument Model’s 845-5, 845-3 and 845-2 have been added to both the FCCC & HR-USC and CA-NV AWWA list of Acceptable Gauges. The 845’s join the 830 on those lists.

Specially Designed for Testing Backflow Prevention Assemblies. These test kits are protected with 90 micron filters to minimize plugging with scale, sand, etc. Filter elements can be cleaned or replaced and test procedures are laminated in clear plastic.
Durable carrying case included.

Differential Pressure Gauges

Differential Pressure Gauges and Switches for every need. Mid-West Instrument has been serving a variety of industries (Power, Chemical, Petro-Chemical, HVAC, Water, Filtration) for over 45 years. Over 500,000 Piston Type units have been produced bearing the Mid-West name or private branded for our OEM customers!

Indicating Transmitters

Competitively Priced, Mid-West indicating transmitters provide local indication with a Traditional Gauge Face. 4-20 Milliamp Output and Loop Powered. These indicators are field wireable and come with out of box operation (NO PROGRAMMING REQUIRED). Max 1000 ohm Loop Resistance. Calibrated and Tested Prior to Shipment.

For pricing and availability on MidWest’s full product line, or for recalibration, please call 973-433-4700 or click here for a quote.