... wellhead, cable junction box, water tank, smart control unit, A frequency control unit, B water quality control unit. 2. special features (1) ESP ... ‰ that can provide3. Main function (1)According to various wells, Control fluid level dropping speed as much as possible to meet ... and saved thru RS232 or 485 port on computer.(3)Smart control production rate according to various well.(4)System can records ...