The optical density is one of the main biomass of microalgae culture determination method. Spectrophotometric method is widely used for this. This process requires direct cultivation of culture, dilution to the desired concentration and measurement of the optical density. Flow sensor of optical density which able to work directly with the photobioreactor in running culture was developed. This sensor does not require a tempering of the culture and can operate without interference from outside. The main task of the sensor - measurement of the optical density of the culture at all stages of growth, and opportunity the software module in the future to connect, which be able to read data from the sensor with a predetermined time interval and keep digital recording.
Microalgae, spectrophotometry, LED, light scattering
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