The Chemical Transducers Group (GTQ) is a solid state chemical sensors area reference group obtained by silicon technologies. The GTQ is a interdisciplinary group recognized international scientific excellence. Transducers are Integrated devices based on microelectronic technology with the capacity to translate chemical information in a processable signal of electrical or optical nature. The main advantages of microelectronic technology are high reliability, quick response, reduced size, robustness and solid state nature, massive fabrication at low cost and reproducibility.