DDM55 Dual Input Digital Differential Manometer with LCD Display, -55 to 55" H20 Measuring Range, 0.01" Resolution, Battery Operated

Used this for an airplane engine that was running high CHTs. Running these two air lines above and below the engine allowed me to work on getting the baffling way better and getting the low pressure on the bottom of the engine adequate to the point that our temperature problems are now solved! A good tool

The unit is accurate and easy to use. The back light for the display is nice. Calibrating the unit is easy. For the money this is a great gauge.

I'm sure it was accurate, but the quality didn't seem much better than the ones on ebay for $40. In fact it looked identical to those except for the brand label. While those aren't reasons to ding it, mine came through with the power button not seated properly, so it kept turning off and on. It had to go back.

Ok manometer. But the Bluetooth function is paired to an app that is not supported on Apple and not updated on android

Great manometer. Very easy to use. Included hoses and two threaded hose barbs. Worked great. Highly recommended. Update: Last week I turned this on and it appeared the battery was low. Screen flashed on like normal but faded off instantly. I installed a brand new battery: same result. Frustrated, I set it down rather firmly on granite counter and suddenly it worked like normal. Haven't had a problem before or since. So while I have a backup, I was surprised (as well as I treat this device) it sort of had a malfunction here. It tests the same as my backup, so maybe some kind of a connection/humidity thing? Specific to my device only? Anyway, if someone else experiences this, just give it a gentle tap. I downgraded my rating a star because of this.

This is cheaply made it hasnt worked since i boight it. Cant turn it on. Cant return it. Supco used to be a great product.

I am a digital age person and this fits what I wanted to use. We had numerous questions about our gas pressure and problems with a poorly engineered piece of equipment. Within minutes I had my numbers and while cross referencing the manual, it all fell into place--- without this manometer it was all a shot in the dark and getting nowhere. Now with new equipment going in place, it will make sure everything is correct and set properly. We even had a specialist come prior to this and he was a complete waste of time as this item saved us from wasteful spending.

I am pleased with this purchase. I am going to attach a magnet to it but other than that it does the job at a reasonable cost. The connectors could be longer but I can get those cheap.

wotk great cheap price and I'm happy !

Easy to use and easy to read. I strongly recommend this device.

Not durable enough build quality to keep in a work truck where things get banged around. Lasted three months before the casing and screen cracked. Ports are for tiny hoses. Will need adapters for use with any manometer hoses larger Go with something stronger and more common hose sizes.

Great product description and prompt shipping