iGaging ABSOLUTE ORIGIN 0-4 Digital Electronic Caliper - IP54 Protection / Extreme Accuracy by iGaging

Producto de muy buena calidad, los felicito. No duden en comprarlo. Vale cada peso invertido.

So far seems ok for measuring coins

Overall, you get what you pay for with this caliper. I regularly use 8" mitutoyo calipers, but wanted something shorter that I was OK banging around for general purpose use, and this is a lot of value for the money. I've been using it every few days for 2 months, and feel qualified to write an honest review. First the good: +It's fairly inexpensive, so you won't feel too bad if you drop it. +It is pretty accurate (more about that later). It is accurate to the .001" tolerance specification in the certificate of calibration. +Overall, it's well built. +The back of the caliper has a fraction to decimal chart. + there is good contrast on the LCD display +I've left the caliper "on" for long periods of time and the battery does not drain fast. +The case looks different than the picture, but allows for a cutout for a base that turns this into a depth caliper as well. Now the not as good: +The locking screw on the slide is not retained, so it's just a matter of time before it disappears without a trace. Some of my other calipers have a retaining ring so this does not happen. +The feel of the sliding is a little more slip-stick than smooth, though I have cleaned it several times. + The directions and certificate of calibration are a little laughable... they include grammatical errors, and don't inspire confidence. +I would have preferred a clear case so I could tell at a glance if the instrument was inside or not. +As one other reviewer also found, there may be burrs on the jaws that need to be removed. I went through mine very carefully to explore why all my measurements were .001-.0035" off my expectations, and found that there was a tiny burr on the jaws that prevented it from closing all the way. I needed to very carefully deburr the edges and then used a superfine Arkansas slip stone to lightly go over the corners and faces of the inside jaw. This helped: the reading no longer wandered a bit when the jaws were pushed closed to .0000. I also verified with a light behind teh jaws that it was closed and no light was seeping through anywhere. I then checked measurements at 1.0000, 2.0000, and 3.0000" with a set of calibrated Mitutoyo carbide standards. And I then checked some random lengths with a Fowler (economy) Gage Block set (all at 70 degrees F). The results usually got me to within .0005" of the expected measurement, sometimes within .0015. This is, as stated in the certification, within tolerance, though there was a little more variability than I expected. Overall, this is good for the money. I also recommend the base that screws on and makes it a quick depth micrometer/caliper.

I may end up returning these for a replacement as the one I got had dirt and grit on the slides and there are noticeable binds when sliding the jaw. My other Igaging calipers are smooth as silk, almost as good as my Mitituyos for reliability. For repeatability, these are great and always go back to .0000 and to the same dimension when using high quality standards. For accuracy, they read .9990" with my 1.00000". Standard +- 5 millionths. Thats... not really terrible, but my cheaper igaging calipers read 1.000 (.9996" -.1004"). That being said, It could be reading something like .9986" and rounding up to .9990 or .9994 and rounding down since the resolution is .0005. I understand if I want to measure sub thousandths, calipers aren't the way to go but the full one thou discrepancy means that these barely passed the certification test of their 2 thou tolerance, +- .001". I'm a bit shocked that what looked like grit was still in the slide and around the jaws. Cleaning wipes helped a bit but the binding is still a problem (yes the screw is not tightened) and while I've taken apart many many calipers before to clean and fix then, I won't be doing so with a new pair. I will update when I receive a new pair. So hopefully they will have better qc.

I have three of the iGaging calipers. This one, the EZCal, and the Bluetooth version. This one is my favorite of the three. It has a good feel, stable readings and has nice features like turning on automatically when you adjust the jaws. I wanted to love the Bluetooth version too, but it has an issue where the readings bounce around even if you aren't touching the tool and doesn't seem overall as nice as this one.