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Fluorescein is a group of fluorescent tracer dyes that absorb blue light and re-emit this light in the green part of the electromagnetic spectrum. The dye molecules are small enough to be able to diffuse among water molecules to form a solution. They are therefore fully dispersed in the water column and move with the water molecules. Several variations of fluorescein dye exist, and though each results in slightly shifted absorption and emission maxima, the selection of wide excitation and emission filters means that only small changes in signal are detected.
An evolution of the miniCTD, the fastCTDplus multi-parameter profiler is designed to deliver the highest quality CTD and Fluorescein observations at fast drop rates.
Valeport’s Hyperion Fluorescein Fluorometer sensor delivers high-performance measurements of Fluorescein, in a compact & robust package ideal as a standalone sensor, for ROV and AUV integration or used as part of a multi-sensor array and data logger.
Valeport’s SWiFTplus Multi-Parameter Profiler with a Fluorescein sensor combines survey-grade sound speed, temperature and pressure sensor technology with Fluorescein observations.
The rapidPro CTD has been developed for the rapid collection of conductivity, temperature (Thermistor) and depth without compromising the quality of the data.