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  Our Catalog   Test, Measure & Inspect   Airflow & Air Quality

Airflow & Air Quality - 361 - Extreame Savings! Save up to 50%


Extreame Savings! Up to 50% off on Airflow & Air Quality at In The National Interest. Top brands include Awair, Dwyer, Sensorcon, ESAB, Fieldpiece, RISEPRO, Guardian Technologies, TSI Alnor, Ohaus, WestWard Tools, Fluke, Testo, & Kestrel. Hurry! Limited time offers. Offers valid only while supplies last.



Awair Glow: Know What's in the Air You Breathe - Air Quality Monitor
Awair Glow: Know What's in the Air You Breathe - Air Quality Monitor
In Stock
$119.00
$99.00
You Save: 17%

mpn: B06ZXY8ZQZ, ean: 0869327000199,

Do you know what's in the air you're breathing? Truth is, indoor air can be more polluted than outside, affecting allergies, asthma, eczema, sleep, and much more. Awair Glow tracks toxins and chemicals in your air and gives you personalized tips to h...


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...


Tough, Waterproof, Made in USA: Carbon Monoxide Tester & Meter (CO Tester & Meter) - CO Inspector, Portable CO Detector Meter & Tester for Monitoring or Analyzing CO
Tough, Waterproof, Made in USA: Carbon Monoxide Tester & Meter (CO Tester & Meter) - CO Inspector, Portable CO Detector Meter & Tester for Monitoring or Analyzing CO
In Stock
$139.00

mpn: INS-CO-01, ean: 6624250224449,

The Carbon Monoxide Inspector is the #1 Portable CO Detector on Amazon! Our portable CO Detector is great for travel, making it simple to monitor carbon monoxide levels in your hotel room. Here are the top 10 reasons Why.1. Great price! 2. Easy to us...


Turbo Torch 0386-0849 NFM-TT Nitrogen Flow Meter
Turbo Torch 0386-0849 NFM-TT Nitrogen Flow Meter
By ESAB
In Stock
$68.82
$34.25
You Save: 50%

mpn: 0386-0849, ean: 0716352560702,

The Turbo Torch 0386-0849 NFM-TT Nitrogen Flow Meter provides precision gas flow control for nitrogen-purging applications. Use with any nitrogen-purging regulator equipped with a 7/16" - 20 male flare to outlet to control the flow of nitrogen gas th...


Fieldpiece Dual-Port Manometer - SDMN5
Fieldpiece Dual-Port Manometer - SDMN5
In Stock
$149.00
$123.96
You Save: 17%

mpn: SDMN5, ean: 0033584958382,

The SDMN5 is a portable, rugged dual-port manometer designed especially for HVAC/R field service technicians. Measures gas pressure, static pressure and pressure differential. The SDMN5 includes a zero adjust button of the face of the meter, a rugged...


Manometer, RISEPRO Digital Air Pressure Meter and Differential Pressure Gauge HVAC Gas Pressure Tester
Manometer, RISEPRO Digital Air Pressure Meter and Differential Pressure Gauge HVAC Gas Pressure Tester
In Stock
$35.00

mpn: HT-1890, ean: 5057647368074,

RISEPRO® Manometer is a professional instrument to measure gauge & differential pressure in the ranges of ±13.79 kPa / ±2 psi / ±55.4 H2O with accuracy of +/- 0.3% in full scale. It can resist up to 10psi but may not show readings when exceeded t...


GermGuardian AC4825 22” 3-in-1 Full Room Air Purifier, HEPA Filter, UVC Sanitizer, Home Air Cleaner Traps Allergens for Smoke, Odors, Mold, Dust, Germs, Smokers, Pet Dander, Energy Star Germ Guardian
GermGuardian AC4825 22” 3-in-1 Full Room Air Purifier, HEPA Filter, UVC Sanitizer, Home Air Cleaner Traps Allergens for Smoke, Odors, Mold, Dust, Germs, Smokers, Pet Dander, Energy Star Germ Guardian
In Stock
$149.99
$83.39
You Save: 44%

mpn: AC4825E, ean: 0895916000851,

Improve your indoor air quality with the GermGuardian 3-in-1 Air Purifier. Perfect for allergy sufferers, the HEPA filter captures 99.97% of dust and allergens as small as .3 microns in size! More than just a filter, the UV-C light kills germs, while...


Alnor RVA801 Hand-held vane anemometer
Alnor RVA801 Hand-held vane anemometer
SKU: #04101342
In Stock
$508.50

sku: 04101342, mpn: 1037486,

1037486 Rva801 is a lightweight, robust and simple to use rotating vane Anemometer that provides accurate and reliable readings every time. Ideal for HVAC commissioning at Grilles, ducts and diffusers. The Rva801 displays readings in metric or Imperi...


Ohaus OSDEFL1412--30L Stainless Steel Defender 7000 Precision Bench Scale, Low Profile, 30 lb.
Ohaus OSDEFL1412--30L Stainless Steel Defender 7000 Precision Bench Scale, Low Profile, 30 lb.
In Stock
$913.60

mpn: OSDEFL1412--30L,

An advanced line of Precision Bench Scales with a durable ABS plastic T71P indicator, dual line alphanumeric display, totalization mode, 255 memory library, statistics print output, painted pressed steel base and dual scale operation with included re...


Westward 3TFP2 Anemometer, Vane and Hotwire
Westward 3TFP2 Anemometer, Vane and Hotwire
SKU: #3TFP2
In Stock
$519.17

sku: 3TFP2, mpn: 5515219,

Anemometer, Vane and Hotwire, Velocity Vane 80 to 4921, Hot Wire 40 to 3900 FPM, Velocity Vane 0.4 to 25, Hot Wire 0.2 to 20 MPS, Velocity Vane 0.9 to 55.9, Hot Wire 0.5 to 44.7 MPH, Temp Range -5 to 175 F (-20 to 80 C), Accuracy Vane +/-2%, Hot Wire...


Fluke I3000S FLEX-36 AC Current Clamp, 600V Voltage, 3000A AC rms Current, 915mm Head
Fluke I3000S FLEX-36 AC Current Clamp, 600V Voltage, 3000A AC rms Current, 915mm Head
SKU: #I3000SFLEX36
In Stock
$639.99
$575.99
You Save: 10%

sku: I3000SFLEX36, mpn: I3000S FLEX-36, ean: 0095969345071,

4.1 out of 5 stars with 38 reviews
The i3000s Flex is an ac current clamp utilizing the Rogowski principle. It can be used to measure currents up to 3000 A when used in conjunction with oscilloscopes, recorders or data loggers. The flexible and lightweight measuring head allows quick ...


Testo 416 Digital Mini Vane Anemometer, 0.63'' Head Diameter, 0.6 to 40 m/s Range, 0 to 60° C Temperature
Testo 416 Digital Mini Vane Anemometer, 0.63" Head Diameter, 0.6 to 40 m/s Range, 0 to 60° C Temperature
In Stock
$503.66
$501.23

mpn: 0560 4160,

The Testo 416 anemometer with telescoping mini-vane probe reaches into ducts to measure air velocity in m/s and fpm and air temperature in degrees C and F; calculates air flow volume in m3/h and cfm; and has hold, maximum, minimum, and mean functions...


Fluke I30S AC/DC Current Clamp, 300V AC/DC Voltage, 30A DC, 20A AC rms Current
Fluke I30S AC/DC Current Clamp, 300V AC/DC Voltage, 30A DC, 20A AC rms Current
SKU: #I30S
In Stock
$624.99
$562.49
You Save: 10%

sku: I30S, mpn: I30S, ean: 5053252451866,

4.8 out of 5 stars with 7 reviews
The i30s current clamp is based on hall effect technology for use in measurement of both DC and AC current. The i30s may be used in conjunction with oscilloscopes and other suitable recording instruments for accurate non-intrusive current measurement...


Fluke 80I-110S AC/DC Current Probe, 600V AC rms Voltage, 70A AC/100A DC Current
Fluke 80I-110S AC/DC Current Probe, 600V AC rms Voltage, 70A AC/100A DC Current
SKU: #80I110S
In Stock
$799.99
$719.99
You Save: 10%

sku: 80I110S, mpn: 80I-110S, ean: 0095969040549,

4.0 out of 5 stars with 54 reviews
The 80I-110s is compatible with any fluke ScopeMeter test tool, power harmonics analyzer, oscilloscope, multimeter. It also compitable with other voltage measurement device with BNC input connectors or if using a meter convert the banana plugs to a B...


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...





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