DEVICE FOR DETECTING DENSITY OF GAS WITH GAS REACTION CHAMBER

摘要

PURPOSE: A gas density detecting device with a gas reaction chamber is provided to detect density of gas by measuring light absorption of gas with infrared rays, and to output the density of gas with an electrical signal by processing the signal from the gas reaction chamber. CONSTITUTION: A gas density detecting apparatus comprises a gas reaction chamber(1100) having a measuring light source(1110) emitting light including a wavelength reacting on gas by voltage in a case, a reference light source(1120) emitting light to a passage not to react on the specific gas by voltage in the case, and a single sensor(1130) receiving the specific wavelength from the reference light source and the measuring light source; and a sensor signal processing unit(1200) supplying power to the measuring light source and the reference light source, and outputting an electric signal in proportion to the density of gas by sorting the signals reacting on the measuring light source and the reference light source. The density of gas is measured accurately with two light sources, one passage and one sensor regardless of noise.