| 摘要 |
<p>PURPOSE:To make it possible to measure even small amount of moisture with good accuracy, by providing a piston in cooling piping for cooling and dehumidifying sample gas. CONSTITUTION:A cooler 12 is provided to the outer wall of cooling piping 11 cooling sample gas and sampling piping 1 is connected to one end part of the piping 11 through a suction valve 13 and a piston 16 reciprocally moving over the entire length of the piping 11 is provided in the piping 11. Dew condensation is promoted by the compression of the piston 16 and, by extruding the water film or water droplet on the inner surface of the piping by the piston 16 so as to trace the same, a moisture collecting time by dehumidification is shortened. Further, because extruding pressure prevents the clogging of a drain pipe 18' due to water on the way thereof, the caliber of the pipe 18 can be reduced. Therefore, even a small amount of moisture can be easily measured with good accuracy.</p> |
