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.
See More
Differential Pressure GaugesUsed 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 (52 Products)
Digital Pressure and Vacuum GaugesSuitable 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(93 Products)
Pressure and Vacuum Gauges(9 Products)
Air Velocity Transmitters(22 Products)
Indicating TransmittersDesigned to provide electronic control and visual monitoring of low-differential pressure. Feature a Magnehelic gage mechanical design and Series 600 transmitter technology(57 Products)
Submersible Level Transmitters(52 Products)
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(9 Products)
Hydronic ManometersThese 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. (13 Products)
ManometersCE-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.(35 Products)
MicromanometersDesigned 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(18 Products)
Digital Temperature SwitchesUsed 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(14 Products)
Duct Pressure SwitchesExplosion-proof and ATEX approved air / differential Dwyer pressure switches used for monitoring industrial cooling-air circuits and flows in ventilation ducts. Feature a silicon diaphragm and have a maximum operating pressure of 1.45 psi (10 kPa)(7 Products)
Float Switches(2 Products)
Flow SwitchesBrass-made flow and level switches used to monitor and control the flow of liquids, gases and steam. Have an electrical contact output at a specific flow rate(55 Products)
Pressure and Vacuum SwitchesDesigned for closing an electric contact when fluid pressure rises or falls in a system. Series 1950 features explosion-proof and weatherproof properties suitables for application in HVAC systems and gas furnaces.(89 Products)
Snap Action Switches(6 Products)
Air Velocity Meters and AnemometersIncludes 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 (7 Products)
Window Sight Flow IndicatorsStainless steel / bronze indicators installed in pipes or tubing to monitor the chemical processes and to detect leaks, flow interruptions and contaminants inside any equipment or system. Feature rotating impellers, Buna-N / fibre seals and removable tempered glass windows(24 Products)
Flowmeters(50 Products)
Ultrasonic Flow Meters(5 Products)
Ultrasonic Flow Meter Detectors(1 Product)
Analog Panel Mount Thermometers(6 Products)
Dial Thermometers(241 Products)
Thermometers and Environmental MetersUsed 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(1 Product)
Thermowells And Thermometers(8 Products)
Temperature Controllers(9 Products)
Signal ConditionerThese 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.(2 Products)
Ball Valves(3 Products)
Digital Panel MetersIncludes 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 (31 Products)
Moisture Meters(1 Product)
Temperature Humidity Meters and Dew Point MetersThermo-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). (1 Product)
Electronic Timers(2 Products)
Powder Bulk Level ControlsHigh-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(12 Products)
Single Pressure Controls(9 Products)
Furnace Control Boards(1 Product)
Temperature ProbesFeature 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(49 Products)
Temperature and Humidity TransducersDesigned 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(76 Products)
Current Transducers(2 Products)
Pressure and/or Vacuum TransducersIdeal 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(63 Products)
Sensing Probes(1 Product)
Thermocouple Probes(6 Products)
Air Flow Capture Hoods(1 Product)
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.
Dwyer Instruments units require simple packaging and are suitable for courier shipment & air freight.
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.
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 resistant.
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 is made to fit in the same diameter cutout as a standard Magnehelic gauge.
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 clean areas. They allow access to pressure, security, calibration and alarm configuration.
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 well as optional precision metering valves.
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 easy-to-read LCD for easy pressure readings display.
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 clean areas. These units have a password-protected setup menu and visual LED alarms.
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.
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.
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.
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.
Yes, Dwyer Instruments products are pre-calibrated for applications like HVAC, industrial processes and laboratories to provide accurate measurement readings.
Dwyer Instruments offers a wide range of products for various application needs, including:
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.