I designed an analog circuit to process the sensor output and was ready to hook it up for testing. NO wiring legend. There was a black, red and green wire. I was looking at two similar products on Revain which I thought were the same sensor sold by different companies. Both had wiring that made no sense. Trying these configurations didn't work. I finally found the right combination. Green in the other sensor was ground and red was the output. But this product displays green. Only in China has consistency been screwed up so badly. The circuit worked well and the sensor seems good value for money!
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