LEDs for fluorescence excitation
The ALGcontrol uses 7 Light Emitting Diodes or LEDs for fluorescence excitation. The LEDs emit light at 7 selected wavelengths (365nm, 450nm, 525nm, 570nm, 590nm,615nm and 710nm). The LEDs in l are switched on, one after the other, at high frequency. The fluorescence signal for each LED is measured and averaged during a pre-defined time. The concentration of the algae will be calculated and the results are displayed in a graph. Correction for other fluorescing matters (DOM and turbidity) will also be calculated automatically.
The ALGcontrol can also be integrated into the TOXcontrol to have algae and toxicity monitoring in one sample.