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DWYER INSTRUMENTS

For more than 80 years, Dwyer Instruments Inc has been offering pressure and flow-measuring instruments. Headquartered in Michigan City, Indiana, USA, the brand benefits the construction, automation, metalworking, transportation, refining and chemical processing industries. Read More

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Test Instruments Filter

Pressure and Vacuum MeasuringView all

  • Differential Pressure Gauge Accessories

    Includes pressure fittings, static pressure tips, gland mountings, flange assemblies, wall plates, wall mounts, ceiling plates, flush mount and outside air static pressure pickups, gage portable and air filter kits, shielded cables and gauge panel mounting flanges suitable for use with differential pressure gauges

  • Differential Pressure Gauges

    Used to measure the pressure difference between two values with a maximum accuracy of +/- 4%. Feature a 4 / 4.5 inch dial to display the pressure difference in liquid and gas flow operations and weatherproof and explosion-proof construction for withstanding hazardous conditions

  • Digital Pressure and Vacuum Gauges

    Suitable for level, pump, process and compressor control applications. Feature an NPT or smooth barb connection, a 4-digit LCD screen and stainless-steel wetted parts, and come in an ABS / glass filled plastic case

  • Indicating Transmitters

    Designed to provide electronic control and visual monitoring of low-differential pressure. Feature a Magnehelic gage mechanical design and Series 600 transmitter technology

  • Manometer Accessories

    Includes digital manometer stands and other mounting accessories, such as brackets and magnet assemblies

  • Manometers

    CE-approved U-tube manometers used to measure positive, negative and differential pressures up to 100 psi. Columns have an outer diameter of 0.34 inch and feature a durable plastic construction.

  • Micromanometers

    Designed to determine both differential and static pressure readings, and to measure flow rate and air velocity. Powered by a 9V battery and can measure up to 200 psig pressure

  • Pitot Tubes

    Single-point sensors designed to measure the flow velocity of liquids, gases or air running through ducts, pipes or tubing. Most of the models feature stainless steel construction and are available in different connection types and sizes

  • Pressure and Vacuum Gauges

    Digital pressure & vacuum gauges that are suitable for monitoring absolute, static and differential pressure in liquids & gases. Include a 4-digit display for error-free reading and a keypad for easy access to features like backlight, peak & valley, tare / auto zero and conversion of pressure units.

  • Pressure and/or Vacuum Transducers

    Ideal for applications requiring measurements in vacuum pressure and negative / positive pressure ranges. Can withstand pressures up to 10000 psi and come equipped with LCD display units capable of precise pressure readings

  • Pressure Gauge Accessories

    Industrial-grade rubber boot designed for protecting pressure gauges against corrosion, impacts and shocks. Ideal for installation in Dwyer DPGA and DPGW pressure gauges.

  • Submersible Level Transmitters

Process MonitoringView all

Temperature and Humidity MeasuringView all

  • Analog Panel Mount Thermometers

    BTPM Series panel mount bimetal thermometers suitable for applications in chemical processing, HVAC and automotive industries. Feature a 3 inch dial with a scratch-proof glass and a stainless-steel housing and can be easily mounted on most instrument panels. Can measure temperatures ranging from -40 to 392 degrees F

  • Dial Thermometers

    Wide range of long-reach, glow-in-the-dark, side-reading, digital, clip-on, magnetic, spring- / clip-pipe mount and sanitary bimetal dial thermometers suitable for measuring temperatures in non-intrusive, tank and vessel monitoring applications. Available in NPT and sanitary connection options

  • Digital Temperature Switches

    Used for monitoring and controlling temperature in heating and cooling applications. Can be found installed in refrigerators, chillers and food service equipment, and come equipped with thermistor-style / thermocouple sensors

  • Temp./Humidity/Pressure Transmitter Acc.

    Includes display upgrade kits for use with transducers and Zener and galvanic barriers to electrically isolates certain Dwyer pressure and level transmitters. Remote displays, mounting brackets, duct mount assemblies and enclosures also available

  • Temperature and Humidity Transducers

    Designed to monitor the humidity and temperature of any environment. Ideal for use in laboratories, environmental chambers, HVAC systems and air handler applications. Available in duct, surface and wall mount variants

  • Temperature Humidity Meters and Dew Point Meters

    Thermo-hygrometers used for measuring the percentage of relative humidity and temperature in Fahrenheit and Celsius. Identify dew point & wet bulb temperatures and display them on the LCD screen. Include a hold feature to freeze current readings (in situations where readings might fluctuate).

  • Temperature Probes

    Feature a contact-style sensing method to measure temperatures ranging from -57 to 302 degrees F. Ideal for applications in medical, HVAC and food and beverage industries

  • Thermowells And Thermometers

    Stainless steel units that are used for separating temperature sensors & transmitters from aggressive media, high pressures and flow rates. Also, provide easy installation / removal of sensing instruments without process shutdown. Available in a maximum length of 12 inches to increase the response time.

Air MovementView all

  • Air Flow Capture Hoods
  • Air Velocity Meters and Anemometers

    Includes anemometers, wind speed indicators and air velocity meters suitable for monitoring the airflow in HVAC systems, fume hood verification, aerodynamic testing and building automation applications. Available in handheld and pocket wind meter variants for complete portability

  • Air Velocity Monitor Accessories

    Wide range of thermo-anemometer probes, wind meter balls, thermo-hygrometer probes, airflow grid sensors, replacement probes, USB cables, vane replacements, differential pressure anemometers, thermo-anemometer probes, wireless mobile gateways and vane thermo-anemometer probes for use with wind velocity transmitters

  • Air Velocity Transmitters

    641 Series transmitters suitable for monitoring the velocity of the fresh, fan (forced) and exhaust air supply in HVAC stacks, lab hood exit vents and air control dryers. Feature a heated-mass flow sensor for delivering results within 1.5 seconds. Can operate in a temperature range of -40 to 212 deg F

Electrical Power TestingView all

Nonelectrical Properties TestingView all

  • Hydronic Manometers

    These Series 490 manometers measure the positive differential pressure in a system, as well as tolerate various liquid media. Kits include two high-pressure rated tubing with shut-off valves, a high-pressure 3-way valve, poly tubing for purges and a rugged travel case with a strap.

  • Moisture Meters
  • Thermometers and Environmental Meters

    Used to measure humidity, temperature, air velocity, air flow and sound. Provide real-time information and feature a 4-digit LCD display to show both current and average readings

About Dwyer Instruments

Dwyer Instruments' catalogue includes a wide range of pressure, flow, temperature, level and air quality measurement instruments. The brand's Magnehelic differential pressure gages provide a quick indication of air or noncorrosive gas pressures (either positive, negative or differential). They feature a rugged design to resist shocks, vibrations & overpressures and a bezel fitting to provide easy flush mounting in panels. These Dwyer differential pressure gages come with a precision litho-printed scale for easy reading and moulded rubber pointer stops to prevent over-travel. They are integrated with a silicon rubber diaphragm to support the front & rear plates and prevent damage due to overpressures. The brand's digital handheld manometers feature a single-button auto-zero function that offers easy on-site calibration and reset facilities. They further come equipped with an extruded aluminium housing to withstand temperatures up to 140 degrees F. These handheld manometers are suitable for measuring positive, negative and differential pressures with +/-0.10% full-scale accuracy.

Things to Consider

Cross-Reference Alternatives

Dwyer Instruments gauges' part numbers cross-reference to various Dayton & Ashcroft products. So, if you're looking for a Dwyer Instruments part that is either obsolete or out of stock, chances are we have the equivalent item available.

Shipping

Dwyer Instruments units require simple packaging and are suitable for courier shipment & air freight.

Major Trade Names

Dwyer Instruments Competitive Advantages

Magnehelic Differential Pressure Gauges

These Dwyer Instruments pressure gauges quickly indicate positive, negative (vacuum) & differential air or non-corrosive gas pressures. They are IP67-rated and resist shock, vibration, water & overpressures.

Frequently Asked Questions

Can standard Magnehelic gauges be installed outdoors?

Yes, their front covers are sealed with O-rings. When installing indoors, the pressure connections leading downward from the gauge should be provided maximum protection from the elements.

Why must Dwyer pressure switches be mounted with the diaphragm in the vertical plane?

The diaphragm can sag in planes other than the vertical plane, causing a shift in set-point or a change in the adjustable set-point range. Even at the smallest set-points, the switch may fail to reset. This is the same phenomenon that causes inaccuracy in Magnehelic and Capsuhelic gauges when they are not mounted vertically.

Are Dwyer Instruments products calibrated?

Yes, Dwyer Instruments products are pre-calibrated for applications like HVAC, industrial processes and laboratories to provide accurate measurement readings.

What products does Dwyer Instruments offer?

Dwyer Instruments offers a wide range of products for various application needs, including:

  • Pressure instruments: Gauges, switches, transmitters and accessories for measuring pressure levels in gases, liquids and vapours.
  • Flow instruments: Products like flow meters, flow switches and flow indicators are available for measuring and indicating the flow rate of liquids and gases in different applications.
  • Temperature instruments: Thermometers, thermocouples, thermowells and RTDs for measuring temperature in various processes.
  • Level instruments: Level switches, level transmitters and level gauges for accurately measuring liquid levels in tanks and vessels.
  • Air quality instruments: Units like humidity sensors, temperature sensors and indoor air quality monitors for checking the air quality in various systems.

How to carry Dwyer testing instruments?

Dwyer carrying cases are designed to keep the valuable test instruments safe while transportation. These units are made of nylon for weather resistance and feature internal soft padding for maximum protection against shocks and impact blows.

How to maintain Dwyer Instruments 616KD differential pressure transmitters?

  • Regularly inspect the transmitters for physical damage, loose connections, or leaks, paying attention to pressure and electrical connections.
  • Perform periodic calibration to ensure accuracy by adjusting the zero and span settings according to the manufacturer's instructions.
  • Keep the transmitters clean by gently wiping the surfaces with a soft cloth or brush, avoiding harsh chemicals.
  • Protect the transmitters from environmental factors, such as extreme temperatures or moisture, using weatherproof enclosures or other appropriate measures.
  • Check electrical connections for tightness and corrosion, addressing any issues promptly.

What are the points to consider while installing a Dwyer pressure transducer / transmitter?

  • During installation, it is essential to ensure that both the device's and the process's sealing surfaces are thoroughly cleaned and undamaged. To prevent any potential leaks, it is crucial to use the appropriate tool when screwing or unscrewing the device.
  • It is important to exercise caution and avoid over-tightening, as this can result in inaccurate test results and potential thread breakage, leading to leaks. By ensuring proper tightness, the performance of the transmitters will not be compromised, allowing for reliable operation without leaks.