- Extech HD750 Differential Pressure Manometer - 5PSI | +/-5 psi range, 11 pressure units, MIN/MAX with time stamp, data hold, zero, USB software, backlit LCD

Edit, Sept 2019: Added photo of Pelican case full of these manometers (two layers deep - several ranges). I really, really like these!Original post: I really like this series of Extech manometers. I own 3 of the 0-0.5 psi, 2 of the 0-2 psi, and one 0-5 psi. I also own about a half dozen Dwyer manometers of various scales. The Extechs are more useful for my work as an industrial burner technician. The min/max/avg feature is very useful for catching transient readings or smoothing out a fluctuating pressure. The display can be illuminated which comes in handy in the usual grimy/dingy/dark plants. On occasion I've used the data logging software, but it's not the most useful feature. The standard 9 volt battery last a very long time. I use rechargeable batteries in mine and get weeks of service between charges. They have an auto power-off feature that can be defeated if you want the manometer to stay on indefinitely. There's even a 120v wall outlet power supply that you can fall back on if the battery is dead. I've only ever had one of these break. The screen was cracked while packed in my luggage. I put these to the test on a daily basis and continue to buy more.

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.

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.

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.

Great tool for shop use and field testing.

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.

The manometer works as advertised. I've used it for static pressure tests on HVAC equipment and leak testing on natural gas/ lp lines. The casing is molded plastic and could stand to be a little more rugged. The battery cover in particular seems to need refinement as mine has a tendency to come loose. I have not tested the software or usb connection. I have no use for that feature, however, the recording feature is great for pressure testing lines. Update. Having owned this meter for about 2 years, I can tell you that it is over all a good meter, but has a few serious issues. The first problem is the temperature range. If you leave it out in your vehicle in below freezing weather, the display screen goes out. The second issue I have had is that the case has cracked in the upper right corner by the screen. Now the screen will only come on if I squeeze it together tightly. Right now, I'm looking into getting a new manometer and I don't think I will be buying this one again. It just isn't rugged enough for my use.

This Anemommeter made analyzing flow much easier when diagnosing large air movement systems.

PARFAIT

Works well! Hose a little short for what I need - but otherwise great. But one could expect no less from Extech or FLIR.

Muy buen instrumento , cumple ampliamente lo que ofrece.Mas exacto que los de la cometencia (Dwyer).Lo recomendamos ampliamente para lo que fué diseñado.

The item is not working at all. Zero reliability. Lecture was crazy and the just stop and the screen was frozen.

Very good in both handheld using and data logging to excel file with real time graph.