Dr Mortaza Vaezi-Nejad graduated in 1979 from University College, London and gained his Ph.D. from Imperial College, London, going on to hold a number of academic appointments. Since 1990 he has been Reader in the Medway School of Engineering at the University of Greenwich, London. He has extensive experience of teaching in electronics and measurement, while his main research interest is in telematics. He has investigated the electrical properties and application of high resistivity materials and devices for image communications. Recently he has become involved in research and development of transducers for the communications industry, and optical image sensors for the process engineering industry. He is a member of the IEE and a Fellow of the Institute of Measurement and Control.

• Chapter 1: IntroductionChapter 2: Recent advances in measurement and instrumentation systems based on optical techniquesChapter 3: Recent developments on amplitude, wavelength, phase and polarisation modulating sensorsChapter 4: Amorphous semiconductor photoreceptors and X-ray image sensorsChapter 5: Dielectrophoretic sensors for microbiological applicationsChapter 6: Electrically conducting polymers for sensing volatile chemicaChapter 7: Thin film (CIAIPc) phthalocyanine gas sensors