Conductivity Monitoring Recommendations

[Rob F]

I know a couple people using the DFRobot analog circuit but not sure how well it works. I think a lot of circuits on eBay are analog as well. If you go that route you'll need the ADS1115 as Pi has no analog inputs.

https://www.adafruit.com/product/1085

Whatever route you go you need to isolated the power and data, DFRobot has one for analog.

https://www.dfrobot.com/product-1621.html

This is their kit but still need the above parts.

https://www.dfrobot.com/product-1123.html