9 pH measurement sensors, redox measurement sensors, oxygen measurement sensors, carbon dioxide measurement sensors, conductivity measurement sensors, turbidity measurement sensors and parts and fittings therefore; operating software and electronic controls for pH measurement sensors, redox measurement sensors, oxygen measurement sensors, carbon dioxide measurement sensors, conductivity measurement sensors, turbidity measurement sensors; transmitters, parts and fittings therefore, operating software and electronic controls therefore, used in connection with pH measurement sensors, redox measurement sensors, oxygen measurement sensors, carbon dioxide measurement sensors, conductivity measurement sensors, turbidity measurement sensors