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Dwyer - Huge Savings! Save up to 16%


Huge Savings! Up to 16% off on Dwyer products at In The National Interest. Hurry! Limited time offers. Offers valid only while supplies last.



Dwyer Series MPR Miniature Pressure Regulator, Zinc Body, Air and Water, 0-15 psi
Dwyer Series MPR Miniature Pressure Regulator, Zinc Body, Air and Water, 0-15 psi
In Stock
$46.90

mpn: MPR2-1,

The Series MPR Miniature Pressure Regulators are compact units that provide low cost, high performance pressure regulation of compressed air or air/water. The low torque, non-rising adjustment knob with locking capability provides easy and precise ad...


Dwyer 2005 Magnehelic Differential Pressure Gauge, Type, 0 to 5'' WC
Dwyer 2005 Magnehelic Differential Pressure Gauge, Type, 0 to 5" WC
In Stock
$63.50
$57.80
You Save: 9%

mpn: 2005,

The magnahelic gauge is the industry standard to measure fan and blower pressures, filter resistance, air velocity, furnace draft, pressure drop across orifice plates, liquid levels with bubbler systems, and pressures in fluid amplifier or fluidic sy...


Dwyer Magnehelic Series 2000 Differential Pressure Gauge, Range 0-10''WC & 0-12500 fpm
Dwyer Magnehelic Series 2000 Differential Pressure Gauge, Range 0-10"WC & 0-12500 fpm
In Stock
$67.95
$57.80
You Save: 15%

mpn: 2010AV, ean: 0094700981103,

Select the Magnehelic gage for high accuracy--guaranteed within 2% of full scale--and for the wide choice of 81 models available to suit your needs precisely. Using Dwyer's simple, frictionless Magnehelic gage movement, it quickly indicates low air o...


Dwyer A-47X-BOOT, Protective Magnetic Rubber Boot for manometers
Dwyer A-47X-BOOT, Protective Magnetic Rubber Boot for manometers
In Stock
$22.90

mpn: A-47X-BOOT,

Boot for Manometers: Dwyer Series: 476, 478, 471, 477, 485, 490Rubber boot for Dwyer manometers. Manometers not included. ...


Dwyer Air Meter Kit, M-460, .02-2.5 cm w.c., 1-20 m/sec with Probes and Carrying case
Dwyer Air Meter Kit, M-460, .02-2.5 cm w.c., 1-20 m/sec with Probes and Carrying case
In Stock
$43.50

mpn: M460,

Simple and quick, the No. M460 Air Meter is popular for servicing air conditioning, heating, and ventilating equipment. Direct reading velocity and static pressure scales - both low and high ranges - show supply and return grille velocities, furnace ...


Dwyer® Differential Pressure Digital Manometer Handheld, 475-000-FM, FM Approved, 0-1.0'' w.c.
Dwyer® Differential Pressure Digital Manometer Handheld, 475-000-FM, FM Approved, 0-1.0" w.c.
In Stock
$261.11

mpn: 475-000-FM,

The Dwyer® Series 475 Mark III Handheld Digital Manometer is ideal for field calibration, monitoring or trouble shooting HVAC systems, clean rooms or a wide range of other low pressure pneumatic systems. This handy instrument measures positive, nega...


Dwyer® Air Duct Temp Sensor, TE-DFN-B0448-00, 4'' Probe, 10K Ohm Type II Thermistor, 8' Plenum Cable
Dwyer® Air Duct Temp Sensor, TE-DFN-B0448-00, 4" Probe, 10K Ohm Type II Thermistor, 8' Plenum Cable
In Stock
$9.00

mpn: 1, ean: 0692579203496,

The Series TE Duct and Immersion Temperature Sensor can be used to monitor air or water temperature throughout a building management system or an air handler unit. Flanged duct sensors monitor the supply or return air and provide a thermistor or RTD ...


Dwyer AC Power Transformer, APT-40-1DN, 40 VA, 120 VAC Input, Dual Hub
Dwyer AC Power Transformer, APT-40-1DN, 40 VA, 120 VAC Input, Dual Hub
In Stock
$20.23

mpn: APT-40-1DN,

The Series APT AC Power Transformers provide isolated step-down to 24 VAC with models offering VA ratings of 40, 50, 75, or 96 VA’s. These low-cost transformers are offered in single or dual 1/2" NPT threaded hub mounts with 8-1/2" 18 AWG wire lead...


Dwyer Magnehelic Series 2000 Differential Pressure Gauge, Range 15-0-15''WC
Dwyer Magnehelic Series 2000 Differential Pressure Gauge, Range 15-0-15"WC
In Stock
$74.00
$62.29
You Save: 16%

mpn: 2330,

Select the Magnehelic gage for high accuracy--guaranteed within 2% of full scale--and for the wide choice of 81 models available to suit your needs precisely. Using Dwyer's simple, frictionless Magnehelic gage movement, it quickly indicates low air o...


Dwyer Series 160 (167-12) Stainless Steel Pocket Size Pitot Tube, 1/8'' Diameter, 12'' Insertion Length
Dwyer Series 160 (167-12) Stainless Steel Pocket Size Pitot Tube, 1/8" Diameter, 12" Insertion Length
In Stock
$82.50
$75.43
You Save: 9%

mpn: 167-12, ean: 0094700752901,

Ideal for use with our precision manometers and air velocity gauges, Dwyer® Pitot Tubes are constructed from corrosion resistant stainless steel for a lifetime of service. ASME design meets AMCA and ASHRAE specifications for maximum accuracy over a ...


Dwyer Rate-Master Flowmeter, RMA-13-TMV, 4% Acc, 100-1000 cc/min air, Top Mounted Valve, PC Body
Dwyer Rate-Master Flowmeter, RMA-13-TMV, 4% Acc, 100-1000 cc/min air, Top Mounted Valve, PC Body
In Stock
$74.90

mpn: RMA-13-TMV,

The Rate-Master® Flowmeter line of direct reading precision flowmeters incorporates many unique user features at moderate cost. These low cost flowmeters are ideal for general use. The direct reading scales eliminate troublesome conversions. The sca...


Dwyer Series MPR Miniature Pressure Regulator, Zinc Body, Air Only, Range 0-15 psi
Dwyer Series MPR Miniature Pressure Regulator, Zinc Body, Air Only, Range 0-15 psi
In Stock
$49.99

mpn: MPR1-1,

The Series MPR Miniature Pressure Regulators are compact units that provide low cost, high performance pressure regulation of compressed air or air/water. The low torque, non-rising adjustment knob with locking capability provides easy and precise ad...


Dwyer® Series CCT40/50 Current Transformer, CCT50-202, Solid Core, Field Selectable Range
Dwyer® Series CCT40/50 Current Transformer, CCT50-202, Solid Core, Field Selectable Range
In Stock
$33.90

mpn: CCT50-202,

The Series CCT40/50 Current Transformers are a low cost alternative for measuring power and monitoring the operation of fans, pumps, or other equipment. For use on existing installations, split core models can be installed without disconnecting cable...


Dwyer Miniature Current Switch, MCS-111050, Solid Core, .5 to 50 A Continuous
Dwyer Miniature Current Switch, MCS-111050, Solid Core, .5 to 50 A Continuous
In Stock
$28.33

mpn: MCS-111050,

The Series MCS Miniature Current Switches are ideal for monitoring the current usage in fuse boxes and small control panels. Both models have adjustable set points and LED indication to show there is power to the unit and when the switch activates. S...


Dwyer Series 475 Mark III Handheld Digital Manometer, 0-40.00''WC Range, 10 psig Maximum Pressure
Dwyer Series 475 Mark III Handheld Digital Manometer, 0-40.00"WC Range, 10 psig Maximum Pressure
SKU: #4752FM
In Stock
$142.00
$128.75
You Save: 9%

sku: 4752FM, mpn: 475-2-FM, ean: 0094704462479,

The Dwyer Series 475 Mark III intrinsically-safe digital manometer provides positive, negative, and differential pressure measurements, and is used to perform field calibration, monitoring or troubleshooting HVAC systems, performing clean room inspec...


Dwyer Visi-Float Series VFA Flowmeter, 2'' Scale, Range 10-100 cc/Minimum Water, 1/8'' Female NPT Process Connection
Dwyer Visi-Float Series VFA Flowmeter, 2" Scale, Range 10-100 cc/Minimum Water, 1/8" Female NPT Process Connection
In Stock
$39.90

mpn: VFA-33,

The Visi–Float flowmeter bodies are cut and precision machined from solid, clear acrylic plastic blocks. This construction not only produces a handsome finished product, but permits complete visual inspection. As a result, the Visi-Float flowmeters...


Dwyer Instruments 626-10GH-P1-E1-S1 Industrial Pressure Transmitter, Stainless Steel, General Hosing, 0-100 PSI, 4-20 mA
Dwyer Instruments 626-10GH-P1-E1-S1 Industrial Pressure Transmitter, Stainless Steel, General Hosing, 0-100 PSI, 4-20 mA
In Stock
$133.99

mpn: 626-10GH-P1-E1-S1, ean: 0094704440019,

The Series 626 Pressure Transmitters possess a highly precise 0.25% full scale accuracy piezo-resistive sensor contained in a compact, rugged, NEMA 4X stainless steel general purpose housing. These pressure transmitters convert a single positive pres...


Dwyer Rate-Master Flowmeter, RMB-83D-SSV, 3% Acc, 1-20 GPH & .065-1.25 LPM water, SS Vlv, PC Body
Dwyer Rate-Master Flowmeter, RMB-83D-SSV, 3% Acc, 1-20 GPH & .065-1.25 LPM water, SS Vlv, PC Body
In Stock
$67.99

mpn: RMB-83D-SSV,

The Rate-Master® Flowmeter line of direct reading precision flowmeters incorporates many unique user features at moderate cost. These low cost flowmeters are ideal for general use. The direct reading scales eliminate troublesome conversions. The sca...


Dwyer 3/4'' Needle Valve, HNV-SSS35B, Female x Female, Pressures up to 6000 psi
Dwyer 3/4" Needle Valve, HNV-SSS35B, Female x Female, Pressures up to 6000 psi
In Stock
$58.90

mpn: HNV-SSS35B,

Series HNV Needle Valve is a barstock style needle valve that is designed for controlling low flow rates of liquids or gases. The valve series features fine threading and large seat area to ensure precise flow control. Wetted materials are 316 SS and...


Dwyer Series 478A Differential Pressure Digital Manometer, -4.00 to 4.00''WC Range
Dwyer Series 478A Differential Pressure Digital Manometer, -4.00 to 4.00"WC Range
In Stock
$150.00
$138.57
You Save: 8%

mpn: 478A-0,

The Dwyer Series 478A digital manometer provides positive, negative, and differential pressure measurements, and is used to perform single-pressure measurements and to set supply pressures, verify pressure switch operation, adjust regulators, check p...



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