These sensors work as described. The distance accuracy is slightly different. Although the description says it works between 2cm and 30cm, I was able to test it in my lab and found that the minimum distance I can set is about 1/4 inch (6mm) and the furthest about 10 inches (254mm). . This is acceptable for my application. but the performance is consistent and reliable. I will be buying again once the first 10 I just received are gone.
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