For testing of virtually all ABS wheel sensors and the Ate-ESP-linearly, statistically and other ABSSensoren. In examining the active and passive wheel speed sensors and their sensor wheels, the sensor tester automatically recognizes which type of sensor is. It is both the function of the sensor, that the sensor signal as well as the "number of teeth" of the sensor wheel checked and displayed. Other sensors can be checked when the target values are known. Thanks to modern flash technology, the sensor tester is optimally prepared for the future and update capability.