Advances in Biosensors Vol.1, b/wEvery research and development in biosensors (as well as in any other research fields) is started from a state of the art review. Such review is one of the most labor and time consuming parts of research, especially in high echnological areas as biosensors and chemical sensors. It is strongly necessary to take into account and reflect in the review the current stage of development, including existing sensing principles,methods of measurements,