Time or condition electronic sensing apparatus for initiating and controlling regeneration or backwash cycles for water treatment equipment; control valves for regulating liquids, namely, control valves for water conditioning and water filtration equipment; bioreactors for culturing cells; scientific portable analytical instruments, namely, a probe with a microprocessor based data conversion logger for measurement of organic and inorganic chemicals in water; filters and filter housings for laboratory use; deionization units for laboratory use, fluid separation apparatus for laboratory use, membrane and ceramic filters for laboratory use; scientific instruments, namely ozone monitors used to detect the presence of ozone in air; laboratory equipment, namely, porous microtiter plates for use in cell biology and other life science applications; computer software for data management in the water treatment and paper field; electronic controllers used to process information in the water treatment field, namely, sensor data, pH level data, conductivity data, and water level data; electronic instruments, namely, instruments that dispense chemicals to an industrial, commercial or municipal water system in measured amounts; scientific instruments, namely, instruments that measure rates of chemical deposition and corrosion, pH level, conductivity, and chromate concentration, instruments that analyze inorganic compounds within water, instruments that analyze microbiological components within water; electronic controls and switches, flow meters, pressure switches, sequence timers all for fluid controls