Dwyer Instruments

Dwyer Instruments has been a trusted leader in controls, sensors and instrumentation for the HVAC and process automation markets since 1931, with roots and facilities across the U.S. Midwest.

From iconic products such as Magnehelic® differential pressure gauges, Photohelic® pressure switch/gauges and Rate Master® flowmeters to a broad range of flow switches, pressure gauges, level sensors and temperature and humidity transmitters, Dwyer delivers accuracy, reliability and value for HVAC, chemical, food and beverage, oil and gas, and air pollution control applications worldwide.

Explore our Dwyer Instruments collection for precision instruments built for accuracy and durability, backed by decades of American engineering.