A radiation detector that utilizes an unregulated power supply as opposed to a regulated power supply, since quantitative results are not required, only an audible signal, and an unregulated power supply is less expensive than that of a regulated power supply. The systems and methods allow an analyst to make sense of massive amounts of data from diverse sources without having any knowledge of the underlying physical data storage. The inlet control valve spool includes a hydraulically controlled deactivation cam that locks the valve in a closed position, rendering the tractor non-operational. The programming device may also transmit patient information and device configuration information to the server for storage with selected programs and rating information within a database as part of a patient record. Metal of the conductive reaction layer is reacted with elemental silicon of the substrate effective to form a conductive metal silicide comprising contact region electrically connecting the conductive reaction layer with the substrate.