Using a capacitive sensor, How can I detect water level inside a tank ?
This can be done using a Glass tank for Example and using two sensors , First sensor is adjusted to detect the the glass and the second sesor is adjusted to detect the water .
Since glass has very low permitivity so the sensitivity of the first sensor needs to be increased , and the permitivty of water is very high so the sensitivity of the second sensor needs to be decreased (so as to detect water only ) .
The attached screen shot is an Example :