The transport properties of synthetic diamond films were studied and the resulting data were applied to the development of a simple device which was used as a temperature sensor. It has been observed that the electrical resistivity follows the variable range hopping conducting process. The sensibility and reliability of the electrical characteristics presented by the sensor were very good in the investigated range of temperatures (10 to 300 K). The sensor reading was unaffected even in the presence of light illumination or magnetic field.
