75010169
Oct 20, 1995
Oct 21, 1997
sensors and probes for the measurement of PH, oxidation-reduction potential, conductivity, turbidity, dissolved oxygen, ozone, residual chlorine, liquid level, fluid flow, fluid color, and associated analytical parameters, the analyzers used therewith, and electrical controllers for controlling the above-mentioned parameters, all used in connection with drinking water and waste water treatment and the control of industrial liquid processes
Electrical and Scientific Apparatus