Sensors and Their Applications is the fifteenth in a series of biennial conferences organised by the Instrument Science and Technology Group of the IOP in the UK. The conference covers all aspects of sensor technology, including both techniques and applications. This year S&A XV will be co-located in Edinburgh with Optical Fibre Sensors 20. The conference has visited venues such as London, Dublin, Glasgow, Southampton, Manchester, Limerick, Canterbury, Liverpool and Cardiff, as well as Edinburgh previously in 1991.