A system that is usable with a subterranean well includes an assembly and a telemetry tool. In the exemplary embodiments, the system of the present invention generates a plurality of phased pulse width modulated signals from a single pulse width modulated signal, where each of the phased signals regulates power to a respective load. The resilient sealing gasket provides a channel for transferring said audio signal from said one or more apertures to the sound passage through the housing wall. The present invention further provides an assay device for detecting toxicants. Thereby, the remaining fuel is provided smoothly and consistently to the engine by optimally manipulating the leftover fuel of the fuel tank.