Instrument: CTD-FRRfluorometer


A CTD-FRRf fluorometer is an instrument package designed to measure hydrographic information (pressure, temperature and conductivity) and chlorophyll fluorescence. (see more at URL: For example, a Chelsea FASTtracka CTD (conductivity, temperature, and depth) device can be configured with additional sensors to measure fluorescence and photosynthetically active radiation (PAR) in the water column. Fluorescence data collected by the CTD are subsequently calibrated and corrected to give the average concentration of chlorophyll a in the water column. The Chelsea system can be configured as part of a towed package or in a shipboard pumping system. (see more from Chelsea Instruments, Molesey, Surrey, United Kingdom at URL: