Liquid Flow Switches
The flow of liquids in pipelines plays an important role in industry and commerce. Under most circumstances it is essential to know whether or not there is a flow in a pipeline, and to act upon that knowledge. A complete line of Liquid Flow Switches has been developed for a wide range of applications and literally hundreds of uses.Learn More
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Air Flow Switches
McDonnell & Miller Air Flow Switches sense air flow or no air flow by responding only to velocity of air movement. They provide a positive and economical way to detect change or loss of air flow velocity caused by closed damper or fan inlet, a loose fan wheel, a slipped or broken fan belt, a dirty or clogged filter, or an overload on a fan motor switch.