Turbidimeter and RGB sensor for remote measurements in an aquatic medium

The present article describes a turbidimeter based on nephelometric scattering measurements, which operates with an infrared source. The device also includes an RGB sensor to obtain information about the color of the sample. The basis of operation and process of calibration of the device are described. The turbidimeter was tested during two months offshore in a bay of northwestern Spain obtaining a periodic turbidity daily signal from the water. On the other hand, the RGB sensor pointed out that the marine suspended particles were primarily green. These data demonstrated that the apparatus detected the diel vertical migration of phytoplankton.