The convective heat transfer coefficient during frying has been determined previously using a metal trans- ducer, as in the case of many food processing situations Ž5, 6, 7.. However, the mass transfer occurring in frying has not been taken into account in these studies. The convective heat transfer coefficient value obtained in the model study is different from the one during frying because of the absence of water vapor bubbles sur- rounding the metal transducer. Therefore, the values of convective heat transfer coefficient obtained by using a