Anassontzis, E. G. Belias, A. Fotiou, A. Koutsoukos, S. and Markopoulos, E. Psallidas, A. Resvanis, L. K. Stavropoulos, G., A light intensity measuring system for sedimentation measurements on KM3NeT optical modules, NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT, (626), S111-S114, 2011, ELSEVIER SCIENCE BV,