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Klein Tools ET180 Digital Manometer, Air and Gas Pressure Tester, Differential Dual Port Pressure Gauge, Large LCD Display with Backlight

  • Based on 556 reviews
Condition: New
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This item's return window has been extended for the holiday season: FREE refund/replacement until Jan 31, 2026

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Availability: Only 3 left in stock, order soon!
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Arrives Dec 16 – Dec 17
Order within 10 hours and 28 minutes
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Features

  • MEASURE STATIC AND DIFFERENTIAL pressure from two ports in air and gas systems
  • MONITOR AND TROUBLESHOOT problems in HVAC Systems with a range of +/- 60 inH2O and full scale accuracy of +/-1.5-Percent
  • STRONG MAGNET ON BACK secures manometer for hands-free operation
  • ELEVEN UNITS MEASURED: Easily toggle between inH2O, bar, oz/in2, psi, mbar, kPa, inHg, mmHg, kg/cm2, ftH20, and cmH2O
  • LARGE BACKLIT LCD provides easy viewing in low light conditions and shows values when toggling between minimum, maximum and average
  • FEATURES INCLUDE auto-power off to conserve battery life and a hold button to lock current reading on the display
  • INCLUDES: ET180 Differential Digital Manometer, 2 m of 1/8-Inch inside diameter silicone tubing, 3 x AAA batteries, storage pouch, and instructions

Description

The ET180 Digital Differential Manometer from Klein Tools measures air and gas pressure for port 1, port 2, and measures the differential between the ports. Easily toggle between units: inH2O, bar, oz/in2, psi, mbar, kPa, inHg, mmHg, kg/cm2, ftH20, and cmH2O. Large, backlit LCD shows minimum, maximum and average values. Magnet on back for hands-free operation. For more than 160 years, Klein Tools has manufactured premium-quality, professional-grade hand tools that deliver the performance, durability and precision needed to get the job done right. Our family of engineers, workers and craftsman continue to put six generations of expertise into every tool we create by using only the highest quality materials, superior workmanship, and keeping manufacturing as close to home as we can. Klein isn't just the name of our company, it's also our family name. And since we're an American company that's family-owned and family-run, you know you can count on us to be here tomorrow. Klein Tools doesn't just make great products, we make great products that stand up to the demands of the professionals who use them every day ... Since 1857.

Brand: KLEIN TOOLS


Material: Acrylonitrile Butadiene Styrene (ABS), Stainless Steel


Item dimensions L x W x H: 2.47 x 1.38 x 6.19 inches


Item Weight: 0.37 Pounds


UPC:


Is Discontinued By Manufacturer ‏ : ‎ No


Product Dimensions ‏ : ‎ 2.47 x 1.38 x 6.19 inches; 5.92 ounces


Item model number ‏ : ‎ ET180


Batteries ‏ : ‎ 3 AAAA batteries required. (included)


Date First Available ‏ : ‎ July 19, 2021


Manufacturer ‏ : ‎ Klein Tools


Best Sellers Rank: #9,904 in Industrial & Scientific (See Top 100 in Industrial & Scientific) #4 in Manometers


#4 in Manometers:


Customer Reviews: 4.5 4.5 out of 5 stars 556 ratings


Frequently asked questions

If you place your order now, the estimated arrival date for this product is: Dec 16 – Dec 17

Yes, absolutely! You may return this product for a full refund within 30 days of receiving it.

To initiate a return, please visit our Returns Center.

View our full returns policy here.

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Leasing options through Acima may also be available during checkout.

Learn more about financing & leasing here.

Top Amazon Reviews


  • Good quality and price
Size: One Size Style: Tester
Easy to use as a single port or dual port. Consistent readings across its full range as compared with a NIST calibrated DM
Reviewed in the United States on November 2, 2025 by Madkaw

  • Good product - recommend labeling your ports
Size: One Size Style: Tester
Great if you need to measure differential pressure. I use mine for checking building pressure at exterior doors. The directions can be a little confusing. You have to know what connection port is for high and which is for low. I used a label maker to put stickers on each port so that I didn't constantly have to consult the manual. Works well enough for routine measurement tasks. If you need something precise, you probably need to purchase a device that can be routinely calibrated by a testing lab that can certify the device at least annually. ... show more
Reviewed in the United States on October 27, 2025 by Jeremy Krueger

  • Small & acurate
Size: One Size Style: Tester
Klein makes a good tool 85% of the time. This one did not disappoint. Compact & accurate tool. Comes with nice zip up fabric case that has a compartment for tubing and connectors needed to use the tool. Recommended.
Reviewed in the United States on October 26, 2025 by Popeye

  • This tool belongs and every trade person's toolbox.
Size: One Size Style: Tester
As an electrician, my expertise typically lies outside the realm of measuring air pressures. However, while working on industrial burners, I encountered a situation where verifying the safety circuit became paramount. In that instance, the precision of this meter not only proved invaluable but also justified its cost with just a single use. Its capabilities transformed a routine task into a critical safety check, ensuring that everything operated smoothly and securely. ... show more
Reviewed in the United States on February 27, 2025 by D. R. Hatton

  • Make sure you have a snug fit with your tubing
Size: One Size Style: Tester
This is a basic unit that is simple to use and easy to read. I needed it to calibrate an ERV. I originally had a very hard time getting a stable reading and even using some stuffing around the tubing to make a better seal didn't help. I bought some natural latex tubing that had a better seal which made things much better and repeated readings were stable. The magnet in the back was very handy to affix the meter in a good location so my hands were free to make the adjustments. I have a second and bigger ERV to install but I'm confident that calibration will go smoothly. If I had to complain about something, it would be the case. It's pretty cheaply made and doesn't really have a good layout for the meter and tubing. But it does it's job. ... show more
Reviewed in the United States on February 17, 2022 by Gary Gendel

  • Good product
Size: One Size Style: Tester
What he needed
Reviewed in the United States on February 11, 2025 by Fan

  • OK, product, rather high price
Size: One Size Style: Tester
It reads in hundreds. It does seem to struggle to hold zero. Overall, the product Is OK. I’ve used it several times it works OK. I guess you can attribute the price to the brand name.
Reviewed in the United States on September 10, 2024 by Pete

  • Great
Size: One Size Style: Tester
Very accurate
Reviewed in the United States on February 21, 2025 by William knowles

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