do water have a constant resistance ?or it is allways variable?
when i mesured the resistance of water in my water tank, at first it showed a very large resistance above 2MΩ,after when i bought the tips of multimeter inside the water close togather and took it away to earlyer position,the resistance is rapedly keeps on decreasing.
the value reached 10Ω,5Ω,3Ω,....
even it reached 0 Ω,and after it started to go to negative value.
so i confused a lot.what is the resistance of water?
in fact i need it to design a water level circuit.
when i mesured the resistance of water in my water tank, at first it showed a very large resistance above 2MΩ,after when i bought the tips of multimeter inside the water close togather and took it away to earlyer position,the resistance is rapedly keeps on decreasing.
the value reached 10Ω,5Ω,3Ω,....
even it reached 0 Ω,and after it started to go to negative value.
so i confused a lot.what is the resistance of water?
in fact i need it to design a water level circuit.