The TS 642 touch probe features mechanical probe activation and is suitable for older controls as well as current third party controls. This is especially useful in machines that are not set up to offer touch probes as standard options. A key component in the TS 642 probe is a mechanical activation microswitch in the taper shank. This makes it useful for applications that do not permit infrared activation. This shank switch allows activation once the probe is inserted in its spindle. Once removed, the probe automatically shuts off thus optimizing probe battery life.