Science Buddies: "Ask an Expert"

Please help:))) At first we could not get the pump to work. Now the pump is working and adjusting the potentiometer will not shut it off. It even runs when the conductivity sensor is not attached. I checked the connections. No wires are touching and everything is as shown and listed in the directions. What could be the problem?

Hello,

I'm no expert on electronics, so maybe another expert can also weigh in to help. But first can you explain again what the exact issue is that you are having? It will be easier to answer your questions that way.

Best,
Pharma