Innovative concept. Fast & easy measurement.
The Benthotorch has made benthic algae measurements and entirely new experience. Different light sources excite the internal pigments of intact algal cells. The amount of re-emitted red light fluorescence gives a quantitative estimate of the algal density and no sample preparation is needed - enabling quick and easy analysis of benthic algae in real time. The BenthoTorch is precalibrated for the most prominent algal classes to be found in the field.
This fluorometric technique has been well-proven for pelagic phytoplankton, by extensive application of the bbe FluoroProbe, and has now been successfully adapted to measure benthic algae concentrations. Background measurement of the substrate matrix enables to compensate and minimize the effect of backward scattering on chlorophyll measurement.
It is operated through the transparent housing using capacity keys located below the display. The key actions are confirmed by a vibration signal, ensuring safe operation of the instrument even in a wet environment. The instrument can be deployed down to a depth of 10 m without the need for a power due to the internal rechargeable batteries.
