FDC1004 water level sensor

Thread Starter


Joined Nov 29, 2016
Hi everyone,
I wonder if anyone had experience with building capacitive water level sensor that is immersed into water. I've successfully replicated fdc1004 reference design, where sensor is mounted on the wall of the tank, but I have problems making it work on the inside of the tank.
Let's assume I pot PCB with capacitive pads and put it in the water – will that work? Should it work? Reference assumes all the lines come from the bottom of the PCB, but when immersed into water they will be saturated all at once.
I am curious about capacitive water level sensing only and preferably based on fdc1004.