Popular DIY potentiostat model developed for current in the microampere range. Not sufficient for industrial applications, which require current about 6 orders of magnitude higher.
Slightly more complex DIY potentiostat with open source code. Also operates in the microampere current range, so it is still insufficient for industrial use.
A more extensive open source potentiostat. The device includes its own coding package and operates in the milli-amp current range. While the performance is improved, this is still 3 orders of magnitude below industrial specifications.
A higher precision answer to the CheapStat. This model improves on error, but still operates in the milli-ampere current range, too low for our purposes.