| 摘要 |
PURPOSE:To perform continuous sampling of gas in a laceway, by attaching a mechanism for preventing the blocking of slug and the like to a laceway sonde, thereby eliminating the clogging by the slug and the like in a gas sucking pipe in the sonde. CONSTITUTION:A porous brick 4 is attached to the tip of a laceway sonde 1 so as to cover a gas sucking pipe 2. Slug and the like are attached to the porous brick 4. since the surface area for sucking the gas is large, holes for gas sucking are sufficiently provided. Therefore, the sampling of the gas in the laceway can be continuously performed. The porous brick 4 is formed in a step shape so that a protruded part 9 is provided. The protruded part 9 is coupled into a recess part 10 formed at the tip of the laceway sonde. |
