Spectral Colorimeter Handheld Color Analyzer Color Testing Equipment with Repeatability ≤0.03 Color Measuring Device Meter Offers Over 30 Measurement Parameters (Model AMT539)

I like the fact that the company has the experience of creating products like these and hence, more reliable for use. I contacted them several times with questions about the SW, etc., and they were very responsive. This will be useful in testing paint for matching older faded paint, colors for fabrics for furniture, etc. For example, you take a old sample to a paint store, they match, put a spot on a stick to visually compare the end mix. Some people's eyes may have minor color blindness and hence, the in-store comparison might appear ok in their light. But way off in the light at home. In building new houses, you get to pick the color. However, the painter they use might have a special deal with an alternate store brand. Hence they make the best match which may be slightly off from the one you selected. If you're lucky they might tell you the brand they used. Most time that info is lost. Then I needed to repaint an area and I can't tell you how many trial quarts I had to buy, from various paint brands, and various grades within each brands to find the 'best match'. (Trust me they always use the cheapest, thinnest crap so try those first.). This unit sure would have made that process easier. I used the unit to test the paint the contractor used against the color we chose -- WAY OFF. The new mixed paint I was able to match -- close but off -- but at least it blended. And now I am seeing the differences between sunlight exposed areas vs dark areas like closets. I can use this to know when to use a different paint sample to buy matching paint -- and test at the store. And if we ever build a house again, I will make it a requirement to test the contractor's paint! The SW they provide can find best matches from some suppliers and/or simply get a trial and test right there. You can also get the sample swatches or color cards and use for comparisons. No eye-balling the results any more! And no more having to repaint a large section rather than a touchup because the paint faded and just doesn't match. The only criticism is they not all paint brands are represented in their their programs. However, most paint companies post their L*a*b* or RGB values for their brands and with a little work you can cross compare. (For the advanced, you might have to look up how to convert between LAB-RGB. There are on-line calculators that can help) It's easy to use, quick, and very repeatable. Also, I can detect small variations from sunlight exposed areas versus darker areas. I can use it for matching fabric colors for couches/chairs, etc. when having to change suppliers. This will be a good investment and I wish I had had this years ago!

For some reason (maybe Amazon storage charges) AMTAST strips the factory air packaging off and ships the $500 unit to you bare in the shelf box. It's a pretty good unit for a non-grating spectrocolorimeter, it is much more stable than the less expensive one and the inter-unit agreement is excellent. I doubt you'd find a comperable unit for under $700 elsewhere.

I think the product probably has some useful applications but there is absolutely no documentation available so it is trial and error at best. Doesn't work on glossy surfaces, doesn't work on natural surfaces like wood. So if you only want to detect non-glossy paint then it might work, but I had a different application in mind. It may have ways to tune the detection, but again no manual or even instructions. Too bad as it seems like it has possibilities way beyond this very limited application. I would NOT recommend this product.

This is a great product. Worked better for me than the others. It supposedly does both 2 and 10 degree incidence angles for the lighting source. The best feature of this device is that one can use it without the app. The app is very powerful, and offers a lot of nice features.

I bought this to use on a Linux workstation. Unfortunately, it doesn't really work on Linux. It comes up as a Serial device, but it only outputs the "a*" and "b*" measurements, not the full set of measurements. I tried to use their provided Windows software, but that didn't even work since it wouldn't recognize my device. All in all, I wouldn't recommend this unless you're only going to use it on-the-go.

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I have a friend who was repainting her den and I told her about this tool. We went through the room and found the exact color of her blue leather chair and the several colors in her Navaho rug. These were the permanent items that were staying after the repainting. Clearly we could not bring those items to Home Depot like you could with a pillow. Using the information from the screen and then putting it against the paint chips we were able to find a color that complemented the chair and one of the colors in the rug. They mixed up a sample for her and she applied it to the wall. Just for fun I analyzed the paint after it dried and it was *almost* exactly correct. One of the figures was off by .1 - which is pretty remarkable considering the differences at that level are pretty hard to see. I really couldn't tell the difference from the paint chip - which could be from the slightly bumpy texture of the wall or any number of things. I have to say that there was no documentation included with the product - just a rudimentary instruction sheet. However when you downloaded the app (I used an iPhone 13 Pro Max) there was much more information and an email to contact the company. I thought the information on the app was sufficient and did not need to contact them, but I am sure there might be less technically oriented users that would find a chat or phone number easier to deal with. As a homeowner, I have a limited number of uses for this, it was more of an interesting product that I thought would be fun to try. However an interior decorator, a painter, printer or publisher, or anyone that works in a position where matching or analyzing colors would find this tool incredibly useful. It was quite easy to use, it has a rechargeable battery, and includes a short usb cord to recharge it. I will admit it is on the expensive side, but if you are someone who needs it, it's a reasonable price for a tool that you will use all the time. It feels relatively solid and is a good size for portability. On the whole, I think it is a good value for the money.

If you've ever used a computer graphics program you've used the 'dropper tool'--it allows you to perfectly match a color on the screen with whatever you're working on in the program. This is the same basic concept, but for the physical world. There's any number of use cases for a device like this--anything where there's a need to accurately match colors. I'm a writer and among other things write frequently about high quality hotels. I use this to identify the colors in room and property decor so I can write about them better. Like a said, any number of use cases. If you understand color meters conceptually, this is pretty easy to use but for casual use I'm sure there are more user friendly options. This is a highly functional and very accurate device. Highly recommended!