Difference of potentiostat to potentiometer?

Hi folks, im new to electronics..

We have a project to create a tool to measure lead content in water...
one of the main material to be use is potentiostat... when i search for it.. they just give me the schematic diagram of it..

is it the same with potentiometer??



Quite different. One (Potentiostat) sounds like it measures things. The other (Potentiometer) is a variable resistor with a knob you turn.

A rheostat is a variable resistor, one fixed terminal and one movable contact.

is it possible that if we created the potentiostat based on the schematic..
we can be port it to arduino as analog input?

thanks for response