Digital Low Pressure Gauge with 1/4'' NPT Bottom Connector and Rubber Protector by Uharbour, 0.35-15 psi, Accuracy 1% .F.S.

Works good so far. Does what its supposed to do.

What a nice gauge! Even includes batteries. Super value.

Good product overall; checks accurate against other gauges, easy enough to read and updates quickly. However, it appears to allow a very slow leak. I have two of these (so sample size of two, not just a single gauge) mounted on quick-connects, allowing me to put them wherever I want in my air systems. When I leave either of them attached to my tank, it loses pressure over time (a few psi/day in a 20-gallon tank); by contrast, when either of my two analog gauges mounted on the same quick-connects are attached to the same port, the tank holds its pressure indefinitely. The analog gauges are also always-instantly-readable, where as these require pushing a button to turn them on, so for tank pressure monitoring these don't replace an analog gauge. If you're not using these in a static-pressure system, then they seem to be a good product.

Good upgrade to my tire checking routine, easy to read, battery life exceptional, has proven tough enough for the usual drops and bumps of home use.

Great digital gauge for my diy morrflate. So far very durable, no air leakage. Super simple and easy to use.

Fast shipping and item was as described.

Great deal. I used for my gas inspection where the inspector wanted a gauge that showed percentages of lbs. He signed us off on our gas test.

I really wanted these gauges to work - I purchased qty 11 of the -15 to +15PSI model. I tested these in a jig with a 0.25% FS calibrated gauge at various pressures. Good: Gauges were linear and accurate to better than 1% FS. Some gauges drifted more than others but within 1% FS. Bad: This was deal-breaker for me & I had to return them. Occasionally (~1 in 10 power turned on; LCD off -> LCD showing value) the gauge would ZERO (i.e., read 0.00) even though tank pressure was different. ALL gauges in test jig had same problem so it's likely to be an inherent flaw to the design (firmware bug). Buttons could not correct this issue, however I found that removing batteries and inserting them (with gauge still under pressure) would return gauge to read correctly! Reading reviews finds examples of others running into same issue: turn on gauge to find it reading 0.00 PSI. If you were to vary pressure in the tank (I was using regulator), it WOULD register higher values correctly and lower pressures as negative. Last 2 photos show the flaw in action. With system at some pressure (it didn't make any difference if 0.5 or 15), gauge would power on to 0.00 with nearby gauges showing correct pressure. I don't show this, but removing battery and putting back would restore gauge to proper operation & show system pressure (again). Photos show jig I used (manifold is mcmaster-carr part #6527N104) and pressures across 15PSI down to 0PSI.

My original analogue guage was totally useless. It used to read up or down. Never anywhere near the correct pressures. I calibrated it and it lasted 1 use before going out again. I saw this one in Amazon for cheaper than most analogue pumps so gave it a try. It comes in a nice box with instructions. I removed the old analogue guage and binned it, then screwed in this new digital guage. Remember to use PTFE tape on the threads and if the guage doesn't sit where you want it when it's tight, use more PTFE tape. Never overtighten anything to do air compressors as the parts are prone to cracking. Inserted batteries and the unit came on right away. I blew up an old spare wheel to 36 psi (see video, bad quality but I'm stuck in the corner of the garage holding the phone and blowing up a tyre, so deal with it). I then put a calibrated digital guage and a calibrated analogue guage and both read the same within a few decimal points, which is to be expected as you'll always lose some air when you connect to the tyre valve. Overall I'm really happy with my purchase and I think it's a great price too.

Manometro preciso,testato con altri strumenti professionali e coincide,sembra affidabile fino a 0,15bar sotto non ritengo sia il suo lavoro,infatti ho preso anche quello da 0 a 1bar. Se posso permettermi,una raccomandazione per chi lo acquista,non usatelo su sistemi che superano o possono superare il suo campo di misura,altrimenti lo rovinate subito. Per esempio,non usatelo direttamente per gonfiare pneumatici,anche se questi andranno a pressioni entro il suo range di misurazione (0-4bar esempio),il compressore sicuramente fornirà molta più pressione a monte,il che potrebbe stararlo. Solitamente i manometri con buona precisione si usano solo per sgonfiare,proprio per non andare fuori scala,tutto qua.

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Ne ho comprato 2... 1 non funziona

Works as expected, shipping was within stated timelines. All good thus far, easy to read digital guage. I had boght 2 of the same, used and both were within 1 psi of each other so seem to be accurate.