FIRe in situ Chlorophyll Fluorometer

The in situ FIRe (Fluorescence Induction and Relaxation) System is the next generation submersible FIRe system capable of measuring variable fluorescence in photosynthetic organisms in situ.

This approach provides:

• Minimum and maximum fluorescence yields in the dark and under natural light (Fo, Fm, Fo', and Fm')
• Maximum quantum efficiency of photochemistry in PSII in the dark (Fv/Fm) and effective quantum efficiency under natural light (Fv'/Fm')
• Quantum yield of photochemistry in PSII (?F'/Fm', or ФPSII)
• Functional absorption cross-section of PSII (sPSII)
• Rates of electron transport on the acceptor and donor sides of PSII (tQa and tPQ)

• Wide dynamic range of fluorescence signals (four orders of magnitude)
• Internal logging with removable multimedia card
• Real-time induction curve processing
• Optional flow cell for dark adaptation and pumped operations
• Built-in pressure sensor
• Optional PAR sensor available