Abstract: A method and apparatus for economically, reliably and efficiently controlling electrolytic processes by measuring the conductivity of the product of the electrolysis, and having the process terminate when a specified conductivity value is reached, that value corresponding to a desired pH and/or ORP value.

Abstract: This rotary engine is made up of three parallel encased rotors: a central male rotor, flanked by a female compression/combustion rotor and a female separation rotor, all three coupled for synchronous rotation. The male rotor has lobes projecting from it, which mesh with complementary cavities in the female rotors during rotation. These cavities have hollows, so that as the lobes mesh with them combustion chambers are formed in the compression/combustion rotor cavities and compression zones are formed the separation rotor cavities. A passage connecting the lobe and combustion chamber provides more opportunity to convert combustion energy into rotational mechanical energy. The separation rotor serves as a pump and separates intake from exhaust gases. Passages connecting the compression zone to the combustion chamber, and that to the exhaust port, help purge residual combusted gases from the combustion chamber.