In message <34F63E7D.5684.0000@landcare.cri.nz>, Jagath Ekanayake writes >How can I get some information on smelling sensors - made >using conducting polymers-plastics and carbon black. > >As far as I know their resistance change due to swelling when >exposed to orders. > >can anyone please help !!! A group at the University of Warwick, UK, is doing a lot of work in this area. Leon -- Leon Heller: leon@lfheller.demon.co.uk http://www.lfheller.demon.co.uk Amateur Radio Callsign G1HSM Tel: +44 (0) 118 947 1424 See http://www.lfheller.demon.co.uk/dds.htm for details of my AD9850 DDS system. See " "/diy_dsp.htm for a simple DIY DSP ADSP-2104 system.