I'am trying to locate (Company?) a Microsensor that will activate an LED when it comes in contact with water. Got to love this site. Many thanks in advance.
Efector is one brand
You need an adjustable capacitive [ asst. voltages availible] proximity sensor
these proxs will operate inside pvc pipe
very handy for level or presense detection
you will still need a current limiting resistor for the led.
Garth