Abstract. A model of the 7200 hot gas automatic TLD card reader has been designed and manufactured in Iran. This study assesses some performance characteristics of the reader including the linearity of response, stability of readouts during a period of time as well as the reproducibility of TLD readouts. Furthermore, the coefficient of variations (COV) of the parameters has been studied and compared with those of standard criteria. The obtained results show that the TLD reader can be used efficiently in dosimetry laboratories.