Isolation Transformer

[kduck63]

I need to build a liquid level sensor using conductance probes that will be exposed to both fresh and saltwater environments. I am thinking of using a small isolation transformer to feed an ac signal to the probes in order to avoid corrosion from electrolysis. Is there any other way to isolate the probes? I would like to avoid using an isolation transformer… any ideas?

[Acetronics2]

Hi,

No need any transformer if you use AC ...

but may be you should use some capacitive measurements ... you could have totally isolated and protected probes ...

Alain

[kduck63]

good suggestion, thanks!