Main Question or Discussion Point
This photo attached is an automatic tap. It doesn't seem to have Infrared sensor. Then, which type of sensor is it.... Just wondering :p
Well, except that it probably is a PIR (passive IR sensor), so it won't be putting out any IR of its own.Use your cellphone to look at the window. You can see near IR with most cellphone cameras...
Duh, I'm a little slow sometimes...Maybe wave a cold rod in front of it, versus a hot rod to see if you can tell that it's sensing IR..