PhytoFlash is an in situ Submersible Active Fluorometer that can be used to determine the quantum efficiency of phytoplankton in both oligotrophic and mesotrophic environments. The PhytoFlash is distinct from other variable fluorescence instruments on the market in that it is the first solid-state instrument (patent pending) capable of variable fluorescence measurements on natural concentrationsof phytoplankton. The solid-state platform allows for a much wider range of uses due to the small size, power efficiency, more stable components, and lower price point.

The PhytoFlash detection system is best described as a short-pulse, multiple turnover variable fluorescence system. The technique utilizes 3 low intensity LEDs to monitor minimum fluorescence (Fo) and, after saturating the cells in the sample chamber using 6 high intensity LEDs, measure maximum fluorescence (Fm). The LEDs are arranged to provide an even distribution of light throughout the entire sample volume. The low intensity of the monitoring LEDs prevents an increase in the photosynthetic rate. Users are able to define the saturation duration (200 - 10,000 ms) of the high intensity LEDs. Under the Laboratory Mode users are able to view the response curve. A dark Flow Through Cap is available to allow for dark adaptation for all three modes.

• Red PhytoFlash version specific to cyanobacteria now available!
• Real time in situ measurement of phytoplankton photosynthetic parameters
• Operate in three different modes
• - Integrate with a CTD
• - Self-contained with internal datalogging
• - Laboratory mode
• Extended battery life - 30 second intervals for over 35 days!
• Large internal data logging memory - 10,000 points

• Indicator of nutrient status
• Precursor for the onset of harmful algae blooms
• Oceanographic, estuarine, limnological and riverine studies
• Active Fluorescence

Report data in either Relative Fluorescence Units (RFU) or Direct Concentration
Digitally integrate into a CTD or third-party system
Low power consumption <1 W typical
Extended battery life (e.g. 30 second intervals for over 35 days)
Large internal data logging memory (10,000 points)
Optional solid secondary standard provides a quick, easy method to verify the calibration of the instrument Features