QCM based biosensors are really popular for various kinds of applications in different areas of science. The main purpose of our research is to develop a living cell based biosensor that can sense a broad spectrum of toxins. It can also be used in clinical settings, to measure the toxicity of various nanoparticles, human beings are subjected to. This application was developed for defense purposes, but is suitable, for civilian applications as well. The other important objective of the research included, to make an electronic driving circuit, for •QCM based biosensor. An equipment which is capable for working at multiple frequencies like the 3^th, 5 ^th, 7^th harmonics etc, apart from working on the fundamental frequency of 10MHz. It is not only this, as far as the civilian application is concerned, we aim to develop it into a personal dosimeter to monitor peak and cumulative measure of exposure over a long period of time. It can be placed at multiple sites such that the data can be monitored from even remote locations.

The idea involved, designing a circuit that is compact as well as easy to use.