We describe a methodology for the characterization of tactile sensors. We address the questions of verification of manufacturer's claims about the output of a sensor, reliability of the output and robustness of the sensor over time. In our work with tactile sensors, it has become apparent that there is a need for a rigorous methodology of characterizing sensor quality. We implement this as a procedure which is specific for the Lord LTS-200 sensor [ref 1] With some modifications, this methodology could be applied to other tactile sensors.