Dwyer Instruments

Dwyer Instruments

Dwyer Instruments is an American manufacturer specializing in instruments for measuring, monitoring, and controlling pressure, flow, temperature, and humidity. Founded in 1931 and headquartered in Michigan City, Indiana, Dwyer has built a broad catalog of sensing and control products used across HVAC, industrial process control, cleanroom monitoring, and building automation systems.

The company is widely recognized for its Magnehelic differential pressure gauges and a comprehensive range of airflow measurement devices used in duct systems, air handling units, and ventilation applications. Dwyer instruments are valued for their durability, accuracy, and accessibility across a wide range of industrial and commercial environments.

Key Product Lines

• Pressure Gauges & Transmitters — Magnehelic gauges, differential pressure gauges, and electronic pressure transmitters for process and HVAC monitoring
• Airflow Meters & Sensors — velocity sensors, pitot tubes, and flow switches for duct and process air measurement
• Temperature Instruments — thermocouples, RTD sensors, and digital temperature controllers for industrial process control
• Humidity & Multi-Variable Sensors — combined temperature and humidity transmitters for cleanrooms and HVAC systems
• Level & Flow Controls — flow switches, level switches, and rotameters for liquid and gas process monitoring

Industries Served

Dwyer Instruments products are widely used in HVAC and building automation, pharmaceutical manufacturing and cleanroom environments, food and beverage processing, chemical and petrochemical facilities, water treatment, power generation, and general industrial process control. Their instrumentation supports both OEM integration and standalone field installations.