Improving environments for a safer and sustainable world


The pressure, humidity, temperature, and flow sensors that we manufacture are used to control and drive process efficiency, creating safe and sustainable environments.


Indoor Environmental Quality

Dwyer Instruments is the premiere manufacturer and innovator of sensors that make up the heating, cooling, and ventilation systems found in our daily lives.

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Critical Environments

Dwyer’s extensive range of monitoring equipment allows for precise control of contained environments, ensuring compliance with regulations.

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Process & Environmental Industries

Our solutions can be found worldwide, improving the environment through the water we drink, the food we eat, the air we breathe, and the technology that we use.

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Product Categories

Our Engineering Laboratory has been accredited by the ANSI National Accreditation Board and meets the requirements of ISO/IEC 17025:2017 for select calibration services.

Known for quality, reliability and accuracy, Dwyer designs and manufactures a full-line of controllers, data loggers, gages, manometers, monitors, remote displays, switches, transmitters, and accessories to measure, monitor and control pressure, air velocity, flow, fan pressure, duct, and more.

Air quality instrumentation is used to monitor and improve the quality of air in an environment and is integrated into an HVAC system. Air filters, flow switches, velocity transmitters, carbon dioxide transmitters, carbon monoxide transmitters, flow sensors, fume hood monitors, occupancy sensors, pitot tubes, and switches/transmitters for temperature/humidity are available.

Flow includes flow transmitters, flow sensors, flowmeters, sight flow indicators, and water meters. Mass flowmeters, controllers, flow indicators and controllers are ideal for measurement of flow rates. Flow switches come as paddle, thermal, piezo, and shuttle/piston.

Level includes bin vibrators, which are ideal in high vibration applications. Pump controllers monitor pump levels and leaks. Level indicators are customizable to fit any application. Level switches come in diaphragm, tuning fork, and more. Level transmitters are capacitive, float, submersible, or ultrasonic. Water leak detectors monitor water levels.

Dwyer sells alarm switch modules, chart recorders, current and particulate transformers/switches, data loggers, fan speed controllers, intrinsically safe barriers, indicating annunciators, motion/safety switches, power supplies and transformers, relays, signal conditioners/converters, SSR monitors, and more.

Process controllers and DIN rail temperature controllers monitor and control temperature, defrost, and fan cycles. Dwyer offers selections of transmitters, thermostats, digital panel mount, limit switches, mechanical switches and thermometers available in dial, spirit filled, or digital.

Test equipment for calibration, measurement, test of air velocity and flow, and monitor backflow, carbon monoxide, and combustion. Distance, electrical control signals, electricity, gas detection/analysis, ground and continuity meters are available. HVAC balancing, humidity, light, and many more are available.

Valves include ball, butterfly, check, globe, needle, and solenoid valves. Actuators come in pneumatic and electric; air filters have different fittings and port sizes; connectors eliminate need of welding; electro-pneumatic controllers, current/pressure transducers, positioners, and position indicators are linear or rotary operation. Volume boosters are also available.

Accessories include carrying cases, cooling extensions, filters, fittings, gage fluids and guards, mounting options, mufflers, pressure snubbers, psychrometers, regulators, siphons, slide charts, static pressure sensors, and tubing.

Power supplies and transformers contain fuse protections, power supplies, and power charges.

Products rated for use in hazardous locations. Includes valves, temperature transmitters, pressure switches which are explosion-proof and compact, flow products that monitor liquid, gas, and air flows, level models where some are submersible and applications vary, and a pressure transmitter which is microprocessor-based.

New Products and Solutions

Dwyer has a long history of innovation in designing and manufacturing our own measurement sensors that provide superior product performance. We’ve also invested in state-of-the-art research and development, for best-in-class product testing and verification.

Series RSMC StabiliSENSE™ Critical Room Status Monitor
Series DM DigiMag® Differential Pressure Transmitter
Series DHC Digihelic® Differential Pressure Controller