FIBER Version


The FIBER version probes surfaces of solid objects by using an optical fiber. Typically the FIBER version is employed to examine photosynthetic layers on various submerged surfaces (periphyton, microphytobenthos) and soil crusts but also to screen samples on microwell plates.

The FIBER version is less sensitive than the CUVETTE and FLOW THROUGH version so that for toxicity biotest systems a chlorophyll concentrations around 100 - 500 µg chlorophyll/liter is recommended.


As in the case of the CUVETTE version, the emitter-detector unit of the FIBER version can be equipped with different-colored LEDs: the WATER-EDF1.5R uses red measuring and actinic light but these light sources are replaced by blue LEDs in the WATER-EDF1.5B.

The WATER-EDF1.5R is configured with an additional blue light source to selectively excite the photosystem I in cyanobacteria or, alternatively, with a far-red light source for photosystem I excitation in many other photosynthetic organisms.