| 摘要 |
The purpose of the present invention is to provide a device for highly accurately detecting particulate matter, and the like. Provided is a concentration detection device provided with a pipe through which a gas passes, a first oscillation unit for generating a first electromagnetic wave, a second oscillation unit for generating a second electromagnetic wave, a first detection unit for detecting a first transmitted wave resulting from the transmission of the first electromagnetic wave through the gas, a second detection unit for detecting a second transmitted wave resulting from the transmission of the second electromagnetic wave through the gas, and a calculation unit for determining the concentration of a prescribed component included in the gas on the basis of the first transmitted wave detected by the first detection unit and the second transmitted wave detected by the second detection unit. |
