Design and Development of ZnO Based Gas Sensor for Fruit Ripening Detection N.H. Hasanuddin, M.H.A. Wahid, M.M. Shahimin, N.A.M.A. Hambali, N.S. Nazir, N.Z. Khairuddin, M.M. Ramli and S.S.M. Isa MATEC Web Conf., 78 (2016) 01109 Published online: 07 October 2016 DOI: 10.1051/matecconf/20167801109