23-08: See the Light – Recent Advances in Fluorescence Help Take Control of Your Cooling ChemistryMonitoring and control of cooling water treatment chemistry has evolved considerably through the years. Benchtop wet chemical analysis of individual grab samples followed by manual adjustment of chemical metering pump output has been widely practiced since the 1960s and is still in use today. Many improvements to the manual process have evolved over the years including metering pumps with feedback capabilities, equipment that automates the sampling