A method of using a triple-effect absorption system to recover methane from landfill gas contaminated with CO2 and trace contaminates such as chlorinated hydrocarbons and aromatics involves processing the landfill gas with three absorbers and a flash system. The device also includes storage means for storing the primary information. Some embodiments include using a doorbell to close an electrical circuit that has a sound output device in a way that precludes the sound output device from inappropriately emitting a notification sound. A push handle is provided for controlling movement of the wheeled dog cover. Finally, a second ion implantation process forms a second doped region in the semiconductor substrate not covered by the photoresist pattern and the organic spacer. The heat passes from the mesh to each of the flow-through tubes via the thermal interface.