FMS/LG2 Light Guide
The FMS/LG2 light guide extends the functionality of the FMS-300 and FMS 2+ chlorophyll fluorometers. It connects to the fibre-optic cable as an optical extension that can be used to measure samples that are not suitable for the typical fibre-optic and leafclip configuration.
FMS/LG2 provides a convenient solution when measuring samples such as Arabidopsis, grasses (including seagrass species), and needles. This light guide could also be used to measure fluorescence signals from liquid samples held in small cuvettes or vials such as algae or chloroplast suspensions.
For simultaneous measurements of oxygen evolution and fluorescence in liquid samples such as chloroplast or algae suspensions, the FMS/LG2 light guide can be immersed in samples within Hansatech Instruments liquid-phase electrode chambers. Using this method, reliable fluorescence data from samples, such as Spirulina platensis, can be obtained from sample concentrations as low as 0.1 O.D.
The glass light guide is 50mm in length with a square cross section. At the fibre-optic cable end, the light guide is 7.5 x 7.5mm tapering to 4 x 4mm at the sample end. The tapered form of the light guide also provides up to 2-times amplification of the light delivered by the FMS-300 with saturating light intensities of up to 60,000 μmol m-2 s-1 available.
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