The Turner Designs Industrial Controller is a low cost, compact fluorometer designed for control of naturally fluorescent species or fluorescent dyes in industrial water systems. The Controller enables control of your process by monitoring fluorescence levels and turning feed pumps on and off as needed. A simple user interface allows for callibration and for control and alarm limits to be set. Datalogging allows for analyzing past events and a 4-20 mA output is available for connection to remote monitors. The Controller is a rugged 24/7 device providing maximum performance, minimal maintenance and solid state reliability.