STP Controllers are designed with state of the art micro-controllers in compact enclosures. They are available with integrated control logic and switchgear with automatically controlled sewage treatment operations. They are available with selectable settings for electrical and process parameters. They are available to work to stand-by rotation sequentially with pump operation timer and level based design. in addition, these STP Controllers are available with blower duty-cycle settable designs along with TDS as well as flow measurement designs through sensors.