PURPOSE: To eliminate rotary section of a pump, by arranging superconducting electromagnets in the flow path of conductive fluid and arranging electrode boards such that the flow path is held between the electrode boards.

CONSTITUTION: Electromagnetic force functions to conductive fluid 1 according to Fleming's law through the function of flux density of a superconducting electromagnet 3 traversing the conductive fluid 1 and the current density flowing from the electrode board 4 through the conductive fluid 1. When sea water is employed as the conductive fluid 1, sodium hypochlorite or chlorine and hydrogen can be produced through electrolysis by properly selecting the material of the electrode board 4. They function to extinct ocean livings which may adhere to the flow path, where oxygen passes through a gas discharge port 6 and only gas is removed through function of a gas separation float valve 7.