| 摘要 |
PROBLEM TO BE SOLVED: To provide a gas concentration measuring device capable of measuring accurately the concentration of hydrocarbon gas, even if the inert gas concentration is high. SOLUTION: This gas concentration measuring device 10 is constituted by being equipped with a sampling tube 11 for sampling gas from the tip side, a pipe 12 having the middle part to which the proximal end side of the sampling tube 11 is connected, an air feeding device 13 connected to one end side of the pipe 12, for feeding the air 103, a hydrogen flame ionization detector (FID) 14 connected to the other end side of the pipe 12, for detecting methane gas, and an arithmetic control device 15 for calculating the methane gas concentration in the sampled gas 102 based on the flow rate of the sampled gas 102 from the sampling tube 11 and the flow rate of the air 103 from the air feeding device 13 as the detection result by the FID 14. COPYRIGHT: (C)2004,JPO |
