Dwyer Instruments

Explore Dwyer Instruments’ range of high-quality measurement and control devices, including pressure gauges, flow meters, and temperature sensors. Essential for industrial, HVAC, mining, agriculture, and lab applications, Dwyer’s instruments offer precision and durability.

1221/1222/1223 Flex-Tube U-Tube Manometers
$0.00 Dwyer

The Dwyer 1221/1222/1223 Flex-Tube U-Tube Manometers is a reliable and accurate instrument for measuring pressure. Suitable for pressures up to 100 psi and with durable and long-lasting plastic construction, this series is a great choice for anyone in need of precise pressure measurement.

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160 Series Stainless Steel Pitot Tube
Dwyer
The Dwyer 160 Series Stainless Steel Pitot Tube features corrosion-resistant stainless steel, easy alignment, no calibration, leak-proof connections, and various lengths, ideal for air velocity or flow monitoring up to 1500°F.
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1950 Differential Pressure Switch
$0.00 Dwyer
The Dwyer 1950 Differential Pressure Switch is a top-performing instrument for measuring pressure in hazardous environments. With a weatherproof and explosion-proof housing, this switch offers a range of set points and is light and compact.
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2-5000 Minihelic II Differential Pressure Gauge
$0.00 Dwyer
The Dwyer 2-5000 Minihelic II Differential Pressure Gauge offers accuracy and value for OEM and user applications. Its compact design can handle pressures up to 30 psig.
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2000 Magnehelic Differential Pressure Gauge
$0.00 Dwyer
The Dwyer 2000 Magnehelic Differential Pressure Gauge is a highly precise and portable instrument for measuring air and non-combustible gases, featuring a 4 ̋ dial face and accuracy within ±2% of full scale.
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3000-MR Photohelic® Switch/Gauge
$0.00 Dwyer
The Dwyer 3000-MR Photohelic® switch/gage accurately measures differential pressure and features large
knobs for easy adjustment. Its compact solid-state design reduces size andweight, and it can be flush or
surface-mounted.
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3100D Explosion-Proof Differential Pressure Transmitter
$0.00 Dwyer
The Dwyer 3100D Explosion-Proof Differential Pressure Transmitter offers flexible pressure calibration, push-button configuration, and 100:1 rangeability. It’s FM or ATEX approved for hazardous locations and can be programmed using HART® Communication.
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473B-1 Vane Thermo-Anemometer
Dwyer
The Dwyer 473B-1 Vane Thermo-Anemometer is a 100mm handheld device, compatible with AP1, RP1, and VP1 probes. Backlit LCD, stores 99 readings, ideal for air balancing, HVAC, and industrial verification.
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616KD Differential Pressure Transmitter
Dwyer
The Dwyer 616KD Differential Pressure Transmitters have One-Touch® Digital Calibration that simplifies setup for air handlers, duct pressure, variable air volume, and filter monitoring.
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626 & 628 Industrial Pressure Transmitter
Dwyer
Dwyer 626 & 628 Industrial Pressure Transmitter 0.25% and 1% full scale accuracy
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629c Series Wet/Wet Differential Pressure Transmitter
$0.00 Dwyer
The Dwyer 629C Series Wet/Wet Differential Pressure Transmitter accurately monitors air, gas, and liquid pressure, converting changes to a 4-20 mA signal or voltage, with easy installation, robust design, and optional remote sensors and LCD.
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A1F OEM Pressure Switch
$0.00 Dwyer
The Dwyer A1F OEM Pressure Switch is a precision-made and cost-effective solution for OEM industrial applications. With excellent chemical compatibility and a 15A contact, it offers accurate pressure measurements without the need for external relays.
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CAM Compressed Air Meter
$0.00 Dwyer
The Dwyer CAM Compressed Air Meter is a precision flow meter designed for compressed air systems. With accurate readings, an easily programmable digital display, and virtually no maintenance required, the CAM is an excellent choice for industrial applications.

(Obsolete. Contact Hinco for alternatives)
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CPS Cable Pull Switch
$0.00 Dwyer
The Dwyer CPS Cable Pull Switch isolates power to your conveyor or process control equipment in case of a shut-down. It trips by pulling the steel wire, and the red flag indicates its status. The universal design makes it easy to install and use.
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DMF Digital Mass Flow Controller
$0.00 Dwyer
The Dwyer DMF Digital Mass Flow Controller is a reliable mass gas flow controller for accurate and repeatable gas flow control. Straight tube sensors with restrictor flow elements ensure precise results. Auto-tune function optimizes control response for specific gases.
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DR Direct Reading Glass Flow Meter
$0.00 Dwyer
The Dwyer DR Direct Reading Glass Flow Meter accurately measures air or water flow rates. It includes a fused ceramic scale with float guides and a reflective plastic background. Shipped fully assembled, it’s easy to install and versatile for various applications.
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DS In-Line Flow Sensor
$0.00 Dwyer

The Dwyer DS In-Line Flow Sensor uses averaging Pitot tube tech for precise flow rate measurements without needing to traverse the stream. It can be paired with a Dwyer Capsuhelic gauge for an affordable and complete flow indicating system.

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DSS Direct Contact Speed Switch
$0.00 Dwyer

The Dwyer DSS Direct Contact Speed Switch is a compact switch designed to produce an output signal at a predetermined speed. All mechanical and electronic components are housed in one unit. Protect valuable rotating equipment such as belt conveyors, bucket elevators, and screw conveyors.

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FS-2 Vane Flow Switch
$0.00 Dwyer
The Dwyer FS-2 Vane Flow Switch offers an economical flow proving solution with custom set points tailored to your application. Field adjustable vane layers and set point adjustment screw enable easy customization. Ideal for “flow or no flow” applications in cold/hot water systems.
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GFC Gas Mass Flow Controller
$0.00 Dwyer
The Dwyer GFC Gas Mass Flow Controller features high accuracy and repeatability, utilizing a straight tube sensor and electromagnetic valve for precise gas flow control. Enjoy easy setpoint adjustments and an LCD readout displaying actual flow rates in engineering units.
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HF In-Line Flow Monitors
$0.00 Dwyer

The Dwyer Series HF In-Line Flow Monitors offer accurate and cost-effective flow measurement. With a design based on a floating sharp-edged orifice disk and variable area flow measurement, these Flow Meters provide an accuracy of ±2.5% over the center one-third of the scale. They require minimal maintenance.

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HFO In-Line Flow Alarm
$0.00 Dwyer
The Dwyer HFO Flow Alarm provides continuous monitoring and control of flow rate levels with two adjustable limit switches. It features an integral direct reading scale and can be mounted in any orientation. Its rugged NEMA 4X (IP65) enclosure ensures durability in harsh environments.
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MS Magnesense® Differential Pressure Transmitter
$0.00 Dwyer

The Dwyer Series MS Magnesense® Differential Pressure Transmitter is a versatile solution for monitoring pressure and air velocity. Exceptional long-term performance is enabled by patented magnetic sensing technology. Field selectable ranges, adjustable digital dampening, and more.

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MW Pocket Wind Meter
$0.00 Dwyer
Monitor wind speed and temperature with the Dwyer MW Pocket Wind Meter for accurate and reliable environmental monitoring. With selectable air velocity ranges and a protective housing that floats, this tool is perfect for on-the-go monitoring.
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P72 Flow Meter
$0.00 Dwyer
The Dwyer P72 Flow Meter is a heavy-bodied meter for corrosives, gases, and high purity fluids. Designed for demanding applications, they are economically priced and ideal for caustic solutions as well as liquid chlorine, sodium hypochlorite and chlorine gas.
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PMT2 Particulate Transmitter
Dwyer

The Dwyer PMT2 Particulate Transmitter measures particulate emissions for machine monitoring. DC-coupled electrostatic induction sensing tech provides accurate results.

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Portable Wind Meter
$0.00 Dwyer
The Dwyer Portable Wind Meter is a mechanical wind meter for environmental monitoring. Ideal for yachtsmen, outdoorsmen, farmers, and more. Direct reading, no calculations needed. Easy to use and comes with a case. The perfect tool for wind speed measurement.
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PUX Portable Ultrasonic Flow Meter Converter
$0.00 Dwyer

The Dwyer PUX Portable Ultrasonic Flow Meter Converter measures flow rates in pipes from the outside. It is a compact and lightweight instrument incorporating the latest electronics and digital signal processing technologies, realizing high performance and easy operation.

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RM Rate-Master Polycarbonate Flow Meter
Dwyer
The Dwyer RM Rate-Master Polycarbonate Flow Meter is suitable for Gas and Liquids. Optional precision metering valve available.
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SBLT2 & SBLTX Submersible Level Transmitters
Dwyer
Accurate, durable submersible transmitters for liquid level measurement, featuring a stainless steel body, corrosion-resistant cable, and optional lightning protection (SBLTX model) for reliable performance in demanding applications.
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Series 475 Digital Handheld Manometer
$0.00 Dwyer
The Dwyer 475 Mark III Intrinsically Safe Digital Handheld Manometer measures positive, negative, or differential pressures of air and natural gases from 1 in w.c. to 150 psid.
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Series 476A Single Low Pressure Manometer
Dwyer
The Dwyer Series 476A Single Low Pressure Manometer has single/dual pressure, electronic zeroing, ±1.5% accuracy. Measures -20 to 20 in w.c. ±1.5% FS. Ideal for field instrumentation, fuel mix adjustment. Features rugged housing, auto-zero, auto power off, unit selection.
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Series 477AV Handheld Digital Manometer
Dwyer
The Dwyer Series 477AV Handheld Digital Manometer measures pressure, air flow and velocity. Accuracy of +0.05.The built-in velocity and flow calculations provide accuracy and save time and error associated with manual calculations.
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Series 477B Handheld Digital Manometer
Dwyer

The Dwyer Series 477B Handheld Digital Manometer is precise, versatile, with memory function. Perfect for lab calibrations and airflow measurements in commercial buildings.

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Series 478A Single Pressure Differential Manometer
Dwyer
The Dwyer Series 478A Manometer is precise, durable, ±0.5% accuracy, auto-zero, auto-off, nine units, ideal for performance verification and fuel mixture adjustment.
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Series 500 Sight Window
$0.00 Dwyer
The Dwyer Series 500 Sight Window is a reliable sight window which displays level or contents of tanks or pipelines. It monitors compatible gases and liquids and is perfect for hydraulic tanks, pressure vessels, coolant tanks, hydraulic lines, and oil reservoirs.
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Series 616W Differential Pressure Transmitter
$0.00 Dwyer
Accurately measure pressure with the Dwyer Series 616W Differential Pressure Transmitter. Enclosed in NEMA 4X (IP66) case, it operates on 4-20 mA signal, features factory calibration with span and zero controls and provides local pressure indication on the LCD display.
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Series 636D Fixed Range Differential Pressure Transmitter
$0.00 Dwyer
The Dwyer 636D Fixed Range Differential Pressure Transmitter accurately measures pressures of liquids, gases, and vapors with 0.5% F.S. accuracy. It is CSA approved explosion-proof and meets NACE standards for off-shore applications.
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Series 641 Air Velocity Transmitter
Dwyer
The Dwyer Series 641 Air Velocity Transmitter provides precise air flow monitoring with 16 selectable ranges, ideal for exhaust stack flow, HVAC, clean rooms, lab hoods, drying processes, and fan tracking, with optional LED display.
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SF Sight Flow Transmitter
$0.00 Dwyer
The Dwyer SF Sight Flow Transmitter provides precise flow measurement & control. With hermetically sealed circuitry, 2-wire loop-powered design, it’s ideal for a wide range of applications. These flow meters are versatile, measuring flow in both directions & can be mounted in any orientation.
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SF2 Sight Flow Meter
$0.00 Dwyer
Dwyer SF2 Sight Flow Meter provides accurate measurement in various applications. Choose from relay or pulse output models with durable construction for broader chemical, temperature, and pressure capabilities.
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SFI-100/300/700 Midwest Sight Flow Indicator
$0.00 Dwyer
Dwyer SFI-100/300/700 Midwest Sight Flow Indicator. Choose from window or tube styles with impellers and internal wipers for cleaning. Available in various connection choices, these indicators are perfect for monitoring flow in pipes in a variety of industries.
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SFI-800 Sight Flow Indicator/Transmitter
$0.00 Dwyer
The Dwyer SFI-800 Sight Flow Indicator/ Transmitter is a durable, low-cost flow meter with a clear plastic construction for easy viewing. It has excellent chemical compatibility, high pressure, and temperature ratings.
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TE-SNW Weather Resistant Surface Temperature Sensor
Dwyer
Dwyer TE-SNW Weather Resistant Surface Temperature Sensor suitable for pipe size 2″ to 6″.
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TFP-GV Gas Turbine Flow Meter
$0.00 Dwyer
Liquid and gas flow measurement made easy with our Dwyer TFP-GV Gas Turbine Flow Meter. The liquid version is also available. Discover accurate flow meters today.
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TR-7 Safe-T-Ground
$0.00 Dwyer
Control your tank truck loading process with the Dwyer TR-7 Safe-T-Ground device. This process control solution continuously monitors ground connection and stops loading if lost. It is explosion-proof, suitable for chemical, oil, and gas applications.
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UFM2 Compact Ultrasonic Flow Meter
Dwyer
The Dwyer UFM2 Compact Ultrasonic Flow Meter is an economical, clamp-on unit for non-invasive pipe measurement, featuring a backlit screen, simple installation, and outputs for volume pulse and 4-20 mA flow rate, ideal for various water applications.
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V10 Mini Flow Switch
$0.00 Dwyer

The Dwyer V10 Mini Flow Switch is a reliable and cost-effective solution for monitoring the presence or absence of flow in your system. This unit features a hermetically sealed reed switch and a trimmable stainless steel vane for field installation in pipelines up to 2″ in diameter.

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V4 Vane Operated Flow Switch
$0.00 Dwyer

The rugged and reliable Dwyer V4 Vane Operated Flow Switch automatically protects equipment and pipeline systems against damage from reduced or lost flow. With a magnetically actuated switching design and no bellows, springs, or seals to fail, it delivers superior performance as a flow switch.

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V8 Vane Operated Flow Switch
$0.00 Dwyer
The Dwyer V8 Vane Operated Flow Switch provides simple operation with accurate flow measurements. Suitable for industrial systems, it can start/stop motors, pumps, engines, etc. Its durable build is leak-proof, and it’s UL-recognized for your peace of mind.
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