I need to measure the water level inside a coffee maker tank.
I bought an 8 inch eTape sensor
and was advised to cut it down to the size I needed and seal the end with silicone. Unfortunately this didn't work. It would have worked but the tank was still to short to use the tape. I need another way of measuring water level over a five inch, curved, plastic surface.
Basically I'm going to use the sensor to measure if the device has water in it. This will stop the unit from attempting a brew if it is empty. This will save the glass jug heating up for nothing and possibly breaking. It also alerts me that I can't brew via twitter. I could do this by having a variable resistor spread over the five inches.
or I could possibly have several pairs of exposed wires glued down the side of the tank. This would need to send a current through the water to detect which ones are wet. Not ideal.
Do you know of any methods or sensors that fit my needs?