@INPROCEEDINGS {422,
author={O. Postolache and P.M. Girão and J. M. Dias Pereira and H.  Ramos},
doi={},
booktitle={IEEE Instrumentation and Measurement Technology Conf.},
title={An IR Turbidity Sensor:Design and Application},
year={2002},
month={May},
volume={Vol 1},
pages={535-539} 
}