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Offering 11 selectable units of measure, the HD755 Differential Pressure Manometer can serve as a low range/high resolution Gauge or provide Differential Pressure up to 0 to 13.85 in. H2O (inches of water). Max/Min recording and Relative time stamp are useful features, as are HD755's Data Hold and Auto Power Off functions. The 0.5psi HD755 also features Zero function for offset correction or measurement and a built-in USB interface. Comes complete with 9V battery, software with USB cable, AC Adaptor, connection hose, built-in stand, and hard carrying case.
From the Manufacturer
The Extech HD755 Differential Pressure Manometer- 0.5PSI has a ±0.5 psi range and eleven selectable units of measure. It shows the max, min, avg. recordings and the relative time stamp. The functions included are data hold, auto power off and the zero function. It has a large LCD display with backlighting to help the user see in low lit areas. Also, this meter has a heavy-duty, double molded housing and a built in USB port. The Extech HD700 Differential 0.5 PSI Pressure Manometer comes complete with one 9V battery, the Windows compatible software with the hook up USB cable, an AC adaptor, a connection hose, a built-in stand and a hard carrying case. Incorporated in 1970, Extech Instruments is based in Waltham, Massachusetts USA, just west of Boston. Recognized for the breadth and depth of its Test & Measurement offering and strong distribution network, Extech was acquired by FLIR Systems in November 2007. Extech Instruments’ high-value, handheld test instruments and FLIR-branded infrared thermal imager are sold through a network of national catalog houses, regional stocking distributors, internet, and international master distributors. The company has become one of the largest manufacturers and suppliers of test equipment and portable printers and the Extech Instruments brand is regarded in many industries as the brand of choice. ISO 9001:2000 certified by TUV, Extech’s enviable reputation is built on innovative products that offer unique and patented designs with features, functions and reliability at an affordable price.
Thien Huynh
Reviewed in Canada on April 26, 2020
HVAC tech. Not accurate compare to expensive one. But it is still working good and good to buy because of cheap price.
dean robert mclane
Reviewed in the United States on August 9, 2019
I call factory and they said it was three digits - incorrect - nice meter but need higher resolution
Amged
Reviewed in the United States on August 18, 2017
I like it
Customer
Reviewed in Canada on November 30, 2017
Works well! Hose a little short for what I need - but otherwise great. But one could expect no less from Extech or FLIR.
Customer
Reviewed in the United States on September 12, 2016
Works great
JohnG
Reviewed in the United States on August 21, 2015
Excellent. I used this for flow measurement on a jobsite where I was on ladders, on roofs, and on manlifts. I had a liquid manometer with me as well, but there was no way I could have used it under those conditions..I compared readings side by side with a conventional manometer, and ti was a perfect match. It even has a magnetic strap to hang it securely on a metal surface to make it even easier to use.
rick ruehl
Reviewed in the United States on August 20, 2014
Use this on most service calls to check static pressure. Long battery life. I use a rechargeable so no big battery expense. I put flex tubes on it and some small nylon tubes at end sliced at angle so I can simply jam into duct and get measurement. Nice hard case that I can keep in van without worry of being destroyed.
Robert Sanges
Reviewed in the United States on January 27, 2014
I service industrial burners for a living. Customer pay good money to fly me around the world to service their equipment. This series of manometers by Extech are the ones I use most often. They are reliable, remain accurate, have very useful recording and min/max/averaging features. Extech makes this item in 3 ranges (this on is 0 to 0.5 psi). It also comes in 0 to 2 psi and 0 to 5 psiIf I had one nit to pick, it would be that they turn on too easily. I must remove the batteries to keep them from accidentally being turned on in my bag or shipping box. They do turn off by themselves after a few minutes, but I have had them drain the battery during transit.
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