Abstract: A tool for insertion of a sensor to a predetermined depth within a bore includes an elongate tool tip terminating at a tip end, a handle affixed to the tip, and an axial passageway extending through the tip and handle to a tool end. A window is provided extending transversely into the tool tip at a location between the tip end and the handle and provides visual access to the passageway. The tool is capable of use in two modes of operation. In a first mode, a bore is drilled into an object body such as a tire to the required depth. The sensor leads are fed through the tip of the tool and pulled through the handle until the sensor touches the tip of the tool. Thereafter, the tip of the tool with the sensor is inserted into the pre-formed bore. The tool tip is then removed out of the bore, leaving the sensor within the bore at the pre-determined desired depth.