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Offering 11 selectable units of measure, the HD750 Differential Pressure Manometer can serve as a low range/high resolution Gauge or provide Differential Pressure up to 0 to 138.3 in. H2O (inches of water). Max/Min recording and Relative time stamp are useful features, as are HD750's Data Hold and Auto Power Off functions. The 5psi HD750 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 HD750 5 PSI Differential Pressure Manometer has a ±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 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.
Colby Johnson
2025-07-30 15:37:40
I bought this with a large pitot tube (not included) to measure air speed in hoses on farm equipment for my job. The device offers different units of measurement which are really handy to keep from having to do conversions afterwards. If in a highly dynamic environment, or doing multiple tests at once with quickly changing variables, I highly recommend using the software that either comes with the device or can be downloaded on their website. Very, VERY useful for graphing outputs rather than trying to guess an average.
Boofus D
2025-05-26 16:03:20
I like everything about this meter except the battery compartment and the magnetic holder. The battery compartment was tricky to put back on and it appears to be something that will break easily. The magnetic holder is just cheesy and the magnet isn't strong enough to hold the meter reliably. If they were trying to copy Fluke's magnetic holder, they missed the mark.But overall, the meter is very good. It gives stable readings, and the display is large enough that I can see it from a distance. The meter backlight function is very convenient for working in dark areas. The record function is nice when measuring an airflow that's varying. You can let the meter sit for 5 minutes, then come back and find the min, max, and average.
Terry M.
2025-01-06 14:16:50
Meter works great, data logging software has a bug in that if you are recording for a long period the time stamp gets out of whack. Running software on Microsoft Surface Book, Windows 10. Other than that I have used it as single pressure and differential pressure. Took some time (minor) to figure out the recording setup, but I am someone who does not read directions until all else fails.
Steve Lindholm
2024-11-26 15:18:57
The manometer is great; accurate and responsive. Datalogging, though, requires the manometer to be connected to a computer running the Extech software. Just need to remember that for datalogging.
YVES VINCENT
2024-11-15 20:05:14
PARFAIT
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