Mid-West Instrument
Made in the USA
Tel: (586) 254-6500 · Fax: (586) 254-6509
6500 Dobry Dr., Sterling Heights, Michigan 48314
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Mid-West News
  Release Date Model Release Description
2/23/2016 ALL MODELS FEBRUARY, 2016 Caltrols Distributing Mid-West® Instrument Products in the Middle East
6/27/2011 700 Introducing Model 700 "WET/WET" Differential Pressure 4-20 mA Transmitter. Range 0-5 PSID (0- 0.35 Bar) thru 0-300 PSID (0-20 Bar) 0.50% Full Scale Accuracy. Full stainless steel construction, compact size, easy installation. Laser welded, fully-sealed construction: NEMA 4X (IP65) Use with Liquid or Gas media compatible with material of construction LCD or LED display available upon request
6/1/2011 522 Mid-West Introduces the New Model 522 Diaphragm Type differential pressure gauge and switch for everyday use. Guaranteed accuracy of 5% Full Scale. Outstanding capabilites in a modestly priced differential pressure gauge. Suited for use on dissimilar fliuds, wet gas and process fluids with particulates present.
3/1/2010 Diaphragm Seals Selection of the proper diaphragm seal for a given application is very important for safety and performance. Mid-West Instrument will be glad to assist you in selection of the most effective diaphragm seal system for your application.
8/25/2008 120, 140, and 142 Mid-West Instrument Differential Pressure Transmitter's Now CSA Listed for Division 2 Hazardous Location Service
6/6/2008 130 Differential Pressure Gauges for Ammonia Service Applications. The use of special materials along with over 7 years of ammonia service experince has enabled our customers to have confidence Mid-West will laways provide a quality gauge and unsurpassed customer service.
3/28/2008 105 Tank Level Gauges For Liquid Hydrogen Service
1/2/2008 555A "New" Model 555A 3-Color Band Differential Pressure Indicator Now available with 1/4" FNPT Mounting Block. OEM Inquiries Welcomed.
2/1/2007 835 "NEW" Model 835 Backflow Test Kit blends the best of all Mid-West test kits, the newly designed 5-Valve 845-5 mounted in our legendary Model 830 case.
2/1/2007 124 NEW MODEL 124 High Pressure 10,000 PSI Cost Effective “Piston Type” Differential Pressure Gauge Proof Pressure 20,000 PSI
12/13/2006 115/116 The New Model 115/116 Tank Level Gauges for Cryogenic and Liquefied Gas Applications
5/1/2006 DPI Installation Flow Control Magazine May 2006 Article
8/11/2005 Models 140, 141, 142 CSA Certification and UL Listing for Div. II application of the Mid-West Model 142 has been received. With this approval the Models 140, 141 and 142 are approved for Class I, Div. II, Groups A,B,C & D and Class II, Division II, Groups F & G applications. All of these units feature diaphragm isolation of high and low side pressures, a choice of aluminum or stainless steel bodies, a variety of elastomers and the option of one or two reed switches and a robust aluminum switch housing with FNPT access.
7/18/2005 Visit Mid-West Please visit Mid-West Instrument at: •ABPA Western Regional Back Flow Conference Orleans Hotel and Casino, Las Vegas, Nevada September 26-27, 2005 •Filtration 2005 International Conference & Expo - Booth 101 Chicago Navy Pier, Chicago, Ilinois November 15-17, 2005 •Power Gen 2005 - Booth 756 Sands Expo, Las Vegas, Nevada
7/18/2005 Model 522 The Model 522 has been introduced for the agricultural irrigation and geothermal markets for filter monitoring or low flow warning applications. These gauge/switch units feature diaphragm isolation of high and low pressure, a choice of 7/8" or 2_" dial sizes and one or two switches with either flying leads or DIN connectors. Body material is aluminum or stainless steel. Customized mounting is available. Please click on the product photo at left for more information.

For complete information on Proposition 65, please read this informational PDF or visit www.p65warnings.ca.gov.