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Dwyer - Extreame Savings! Save up to 50%


Extreame Savings! Up to 50% off on Dwyer products at In The National Interest. Hurry! Limited time offers. Offers valid only while supplies last.



Dwyer Portable Static Pr Tip, A-303, For 3/16'' Plastic/Rubber Tubing, 4'' (101 mm) Insertion Depth
Dwyer Portable Static Pr Tip, A-303, For 3/16" Plastic/Rubber Tubing, 4" (101 mm) Insertion Depth
In Stock
$9.95

mpn: A-303, ean: 0692579202550,

These sensors are for use with Manometers, Magnehelic® Gages, Pressure Switches and other Controllers to pick up or sense static pressure drop across air filters and cooling coils, blower input and discharge pressures, etc. The angled tips shown hav...


Dwyer Series Mark II 25 Molded Plastic Manometer, Inclined-Vertical Scale, 0 to 3 inH2O Measuring Range, Red Gauge Fluid, 0.826 sp. gr.
Dwyer Series Mark II 25 Molded Plastic Manometer, Inclined-Vertical Scale, 0 to 3 inH2O Measuring Range, Red Gauge Fluid, 0.826 sp. gr.
In Stock
$41.64
$28.80
You Save: 31%

mpn: 25, ean: 0094700679932,

The Dwyer Mark II 25 inclined differential manometer with red gauge fluid has a 0 to 3 inH2O measuring range, built in zero level and molded plastic case for monitoring air velocity and air filter performance, and taking pressure measurements above a...


Dwyer WE Anderson Series FS-2 Vane Flow Switch, Paddle, 1'' Male NPT, 145 psig Max. Pressure
Dwyer WE Anderson Series FS-2 Vane Flow Switch, Paddle, 1" Male NPT, 145 psig Max. Pressure
In Stock
$47.00

mpn: FS-2,

The Series Fs-2 Vane Flow Switches Offers An Economical Flow Proving Solution. The Fs-2 Paddles Are Adjustable To Fit 1 To 8" Size Pipe. Made in United States. Manufactured by Dwyer Instruments.Low Cost. Field Adjustable Set Point And Paddle. Sold As...


Dwyer Flotect Series V10 Mini-Size Flow Switch, Brass Housing, Normally Open or Closed, Pressure Range 0-1000 psig, 1/2'' Male NPT
Dwyer Flotect Series V10 Mini-Size Flow Switch, Brass Housing, Normally Open or Closed, Pressure Range 0-1000 psig, 1/2'' Male NPT
SKU: #V10
In Stock
$46.50

sku: V10, mpn: V10,

Designed to provide an inexpensive, reliable unit to monitor the presence or absence of flow in a system. The V10 flow switch is used to monitor unattended equipment and protect it from costly damage. The V10 flow switch utilizes a rugged, hermetical...


Dwyer Flotect Series V6 Mini-Size Flow Switch, Brass Upper and Lower Housing, SPDT Snap Switch, 1-1/4'' NPT Process Connection, Brass Tee
Dwyer Flotect Series V6 Mini-Size Flow Switch, Brass Upper and Lower Housing, SPDT Snap Switch, 1-1/4" NPT Process Connection, Brass Tee
In Stock
$197.50
$189.99
You Save: 4%

mpn: V6EPB-B-S-4-B,

Surprisingly compact, the Series V6 Flotect® Flow Switch is engineered to specifically monitor liquid, gas, or air flows. Operation is simple and dependable with no mechanical linkage as the flow switch is magnetically actuated. The lower body holds...


Dwyer Liquid Flow Controller, TSP110, PP Wetted Parts, 0.7'' (1.8 cm) Sensor
Dwyer Liquid Flow Controller, TSP110, PP Wetted Parts, 0.7" (1.8 cm) Sensor
In Stock
$691.90

mpn: TSP110,

Protect pumps and valves from dry running with the Series TSP Liquid Flow Controller. The Series TSP combine a liquid flow switch with a fail-safe relay controller to detect a flow or no flow situation and provides switching for direct actuation of p...


Dwyer Liquid Flow Controller, TSP120, PP Wetted Parts, 2.1'' (5.3 cm) Sensor
Dwyer Liquid Flow Controller, TSP120, PP Wetted Parts, 2.1" (5.3 cm) Sensor
In Stock
$703.90

mpn: TSP120,

Protect pumps and valves from dry running with the Series TSP Liquid Flow Controller. The Series TSP combine a liquid flow switch with a fail-safe relay controller to detect a flow or no flow situation and provides switching for direct actuation of p...


Dwyer Digihelic Series DHII Differential Pressure Controller, Range 0.25''WC
Dwyer Digihelic Series DHII Differential Pressure Controller, Range 0.25"WC
In Stock
$680.90
$654.00
You Save: 4%

mpn: DHII-002,

4.0 out of 5 stars with 21 reviews
The Digihelic Controller just got better with the New Series DHII Differential Pressure Controller. The DHII takes all the fabulous features of the standard Digihelic® Pressure Controller and packages them in a robust NEMA 4 (IP66) housing. The Digi...


Dwyer MIDWEST Series SFI-100 Sight Flow Indicator, Single Window, Bronze Body, 316 Stainless Steel Impeller, 1'' Female NPT Connections, PTFE Gasket, 5.688'' Length x 3.250'' Depth x 3.625'' Height
Dwyer MIDWEST Series SFI-100 Sight Flow Indicator, Single Window, Bronze Body, 316 Stainless Steel Impeller, 1" Female NPT Connections, PTFE Gasket, 5.688" Length x 3.250" Depth x 3.625" Height
In Stock
$410.04
$204.78
You Save: 50%

mpn: SFI-100-1-G1-I2,

4.2 out of 5 stars with 15 reviews
Series 100 and 300 Sight Flow Indicators are manufactured of quality materials and safety tested to assure long, dependable service at economical prices. The 100 and 300 Series offer threaded process connections, viewing windows, and bodies of brass ...


Dwyer Smart Indicator Transmitter 13220 (4163)
Dwyer Smart Indicator Transmitter 13220 (4163)
In Stock
$590.22

mpn: 13220,

Dwyer Smart Indicator Transmitter 13220 (4163)...


Dwyer Series ISDP Intrinsically Safe Differential Pressure Transmitter, 0-5.0''WC
Dwyer Series ISDP Intrinsically Safe Differential Pressure Transmitter, 0-5.0"WC
In Stock
$808.80

mpn: ISDP-006,

The ISDP Differential Pressure Transmitter provides a 4-20 mA process output, a robust NEMA 4X enclosure, plus a large LCD display that can be programmed to read in pressure, velocity or flow. The ISDP offers simplified programming via a Menu key tha...


Dwyer® 490A Wet/Wet Handheld Digital Manometer, 490A-5, 0 to 500 psi (0 to 3448 kPa)
Dwyer® 490A Wet/Wet Handheld Digital Manometer, 490A-5, 0 to 500 psi (0 to 3448 kPa)
In Stock
$643.90

mpn: 490A-5,

The SERIES 490A Digital Manometers are versatile, hand-held, battery operated manometers available in several basic ranges for positive or positive differential pressure measurement and can tolerate most liquid media compatible with 316LSS. A new fea...


Dwyer Air Velocity Monitor, 670, Ensures Proper Fume Hood Performance, CE Approved
Dwyer Air Velocity Monitor, 670, Ensures Proper Fume Hood Performance, CE Approved
In Stock
$501.90

mpn: 670,

Dwyer® Model 670 Fume Hood Monitor continuously senses air flow through the face of the fume hood, ensuring safe levels of fresh air are exhausting potentially hazardous fumes eliminating operator exposure. The 670 provides a highly accurate hot wir...



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