Extech HD755 Heavy Duty Differential Pressure Manometer - 0.5 psi Low Range & High Resolution | Digital HVAC Gauge with 11 Measurement Units, USB Interface, Backlit Display, and Hard Carrying Case

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.

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.

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.

I call factory and they said it was three digits - incorrect - nice meter but need higher resolution

I like it

Works great