Dwyer Instruments, Inc., produces a broad range of measuring and control instruments for pressure, flow, temperature, level and valve applications. The first Dwyer Instruments were manufactured in 1931 in Chicago, Illinois. Now we have over 3,000 products.

Many of these instruments are widely known by their individual brand names, such as Magnehelic® and Spirahelic® pressure gages, Photohelic® switch/gages, Rate-Master®, Mini-Master® and Visi-Float® flowmeters, Slack-Tube® and Flex-Tube® manometers, and Dwyer® pressure switches.

Other established Dwyer brands, including Flotect® flow and level switches, Hi-Flow® valves, Self-tune® temperature controllers and Iso-Verter® signal converters/isolators, are the products of companies that are now divisions of Dwyer Instruments--Mercoid, W.E. Anderson, Proximity Controls and Love Controls.

Dwyer's recent product acquisitions include Dickson's MinigraphTM strip chart recorder, ABB Kent-Taylor's Hi-Flow® valves and Quick-Scan® recorders and controllers. Another recent addition is a complete line of butterfly valves.

In addition to making and selling quality precision instruments, Dwyer is committed to a standard of customer service--including competitive prices and knowledgeable, courteous technical support-that generates and sustains long-term relationships.