Instrument: Fluorometer
A fluorometer or fluorimeter is a device used to measure parameters of fluorescence: its intensity and wavelength distribution of emission spectrum after excitation by a certain spectrum of light. The instrument is designed to measure the amount of stimulated electromagnetic radiation produced by pulses of electromagnetic radiation emitted into a water sample or in situ.
Turner float-mounted C3 fluorometers equipped for chl, phycoerythrin and CDOM.
For more details see:
http://www.turnerdesigns.com/products/submersible-fluorometer/c3-submersible-fluorometer