description klein digital differential manometer 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. measures p1, p2, and differential air and gas pressure. full scale accuracy of +/-1.5%; range of +/- 60 inh2o. magnetic back, large backlit lcd, hold, and auto-power off. large lcd is backlit for easy viewing in low light conditions. auto-power off feature conserves battery life. hold button locks current reading on the display. silicon tubing, 3 x aaa batteries, and storage pouch included. 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. california proposition 65 warning. view warning label features digital manometer measures air and gas pressure for ports p1, p2, and differential range of +/- 60 inh2o and full scale accuracy of +/-1.5-percent strong magnet on back for hands-free operation units measured: inh2o, bar, oz/in2, psi, mbar, kpa, inhg, mmhg, kg/cm2, fth20, and cmh2o calculates minimum, maximum and average values large lcd is backlit for easy viewing in low light conditions auto-power off feature conserves battery life hold button locks current reading on the display silicon tubing, 3 x aaa batteries, and storage pouch included specifications acme tools brand name klein tools acme tools part number et180 additional contents 6.56' (2 m) x 1/8" (3 mm) inside diameter silicon tubing, 3 x aaa batteries, pouch, instruction manual assembled weight (lbs) 1 battery type aaa california proposition 65 warning required yes case included yes country of origin china globaltradeitemnumber (gtin) 00092644693366 internal supplier part # et180 internet product code (ipc) 36455791909 manufacturer warranty please refer to attached warranty document. maximum pressure (psi) 2.16 minimum operating temperature (°f) 32 overall height (in) 6 overall length (in) 2 overall width (in) 1 package depth 10.75 package height 2.5 package weight 1 upc 092644693366 weight (lbs) .5