Abstract: In a bipolar plate of a fuel cell and a fabrication method thereof, the bipolar plate of the fuel cell includes a plate; a fluid flowing space formed on both sides of the plate; a fluid guide mesh installed on the fluid flowing space; an inflow path formed on the plate to be connected with the fluid flowing space; and an outflow path formed on the plate to be connected with the fluid flowing space. Also, in the fabrication method, the bipolar plate is fabricated with a certain mold and by a processing method. Accordingly, it is possible to uniformize flux distribution and reduce flow resistance of fuel and air respectively flowing into a fuel electrode and an air electrode of a fuel cell. In addition, reaction area with a M.E.A and diffusion zone can be increased, and fabrication can be simplified and facilitated.

Abstract: A method and apparatus for protecting workers from casualty due to a combustible gas. A portable combustible gas detector is disclosed which is particularly suitable for portable use. The detector generally comprises a circuit, housed in the same chamber as the sensor, for controlling the operation of the gas detector; and operation software for operating the detector through the circuit. The circuit of the detector is encased in armor to protect the circuit from electromagnetic wave disturbance. The detector is particularly suitable for measurement of a combustible gas with a low concentration. Advantageously, the present invention enables a worker to conveniently carry a small and lightweight combustible gas detector into a hazardous worksite to improve the safety of each worker carrying the device.

Abstract: A method and apparatus for protecting workers from casualty due to a combustible gas. A portable combustible gas detector is disclosed which is particularly suitable for portable use. The detector generally comprises a circuit, housed in the same chamber as the sensor, for controlling the operation of the gas detector; and operation software for operating the detector through the circuit. The circuit of the detector is encased in armor to protect the circuit from electromagnetic wave disturbance.