An apparatus, system, and method are disclosed for sensing the presence of a person and directing an audible message to the person. As a result of the normalization, the corrected or compensated focus error signal or track error signal is generated independently of the reflection properties of the respectively scanned track. An annulus is defined between the pump tube and the casing. Once the update of the firmware is complete, the security module is again directed towards the main stream. The faucet thermal monitoring system includes a housing which is couplable to a spout of a faucet and thermally conductive such that heat is conducted between water flowing through the spout and the housing and a liquid crystal temperature panel coupled to the housing providing a visual indication of the temperature of the water flowing through the tap.