Design and Test of a Low-Cost RGB Sensor for Online Measurement of Microalgae Concentration within a Photo-Bioreactor. - Micaela Benavides; Johan Mailier; Anne-Lise Hantson; Gerardo Muñoz; Alejandro Vargas; Jan F. M. Van Impe; Alain Vande Wouwer (Sensors, 2015)