Gaston - I am working on a water sensor (to che...
I am working on a water sensor (to check if there is any water in the bilge). What I have read is that water sensor corrode because of electrolysis (which occurs when you set 3v on a water sensor). To reduce the corrosion you can use a digital out pin to power the sensor and turn it on when you want to take a measurement (you could measure every minute).
An alternative is to use a capacitive sensor to prevent electrolysis. I am not sure if we can use one of the 'touch' pins of an ESP32 for that.
Any suggestions or experiences that someone cares to share about the issue above or water sensors in general?
5 Replies
electrolysis only happens when the water sensor is wet... just make sure your bilge is dry, and you won't have any electrolysis 😉
Can't argue with that. But my bilge is slightly humid (and then the sensor also) and sometimes the last bit of water can't be pumped away.
And maybe a capacitive water sensor is even better or easier.
I have seen examples of using the capacitive touch pin for measuring water. I bought one that is supposed to use two pins to flow current through the water and would require a switch so it’s not always on and causing electrolysis. I am curious how you end up implementing it because I really want a wired sensor for esp32 but haven’t committed to a solution. I am currently using Shelly wireless flood sensors for now
Unknown User•13mo ago
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I'm pondering the same thing - either a flotation device, a "grove water sensor" (i2c strip sensor) or ultrasound - ultrasound is probably the easiest to mount in my boat. Have your tried anything yet?