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.
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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
Current Transducers Digital Panel Meters Includes temperature, process and pressure digital panel meters suitable for monitoring and displaying the differential pressure and temperature values in walk-in coolers, refrigerators and panel process devices. Designed to accept input signals from transmitters and sensors
Powder Bulk Level Control Accessories Full / half coupling flanges featuring carbon steel / stainless steel construction and banana / L / tri paddles having minimum bulk density ranging from 5 to 70 lb per cubic foot
Powder Bulk Level Controls High-quality SPDT / DPDT electromechanical level switches used for level monitoring of bulk materials. Feature a NEMA 4X enclosure and NPT connections, and offered in capacitive, tuning fork and paddle variants
Process Calibrator Accessories Signal Conditioner These Iso Verter Series process signal converter / isolators completely isolate the process input signals from the output or ground signals. Units are field-programmable for reverse or direct action and mount on industry-standard 35 mm DIN rails.
Ultrasonic Flow Meter Detector Accessories Ultrasonic Flow Meter Detectors Ultrasonic Flow Meters
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
Instrument Combination Kit Power Meters and Analyzers Accessories Test Instrument Carrying Cases Ideal for storing and protecting manometers against impact and entry of contaminants. Come with double zippers for quick and easy access and belt loops that snap close for maximum safety.
Test Lead Connectors
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
2000 Series Magnehelic Differential Pressure Gages
They provide simple, frictionless movement for quickly indicating positive, negative (vacuum) & differential air or non-corrosive gas pressures. They are shock, vibration, water & over-pressure resist...Read more
DM Series DigiMag Differential Pressure Transmitters
They detect the pressure of air and compatible gases and provide a 4 - 20mA output signal. The polycarbonate moulded housing has integral pressure connections, which saves time during installation. It...Read more
RPMC Series StabiliSENSE Critical Room Pressure Monitors
These monitors are ideal for critical low differential pressure applications requiring precise pressure monitoring. They can be configured to monitor positive or negative pressure in protected and cle...Read more
VF SERIES Visi-Float Acrylic Flowmeters
These precision machined, direct reading flowmeters have a clear acrylic body and are suitable for both gas & liquid applications. They are available with 2 inch (51 mm) and 4 inch (102 mm) scales, as...Read more
DigiMag Differential Pressure Transmitters
These transmitters can detect air and non-combustible gas pressures. Their polycarbonate moulded housing is integrated with pressure connection points to save time during installation. They have an ea...Read more
StabiliSENSE Critical Room Pressure Monitors
These monitors are ideal for critical low-differential pressure applications requiring precise pressure monitoring. They can be configured to monitor positive or negative pressure in protected and cle...Read more
Visi-Float Acrylic Flowmeters
These direct reading flowmeters have a white background for easy reading and are suitable for both gas & liquid applications. Their precision-machined tapered bore enables high repeatability.
Dwyer Instruments Competitive Advantages
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.