| 摘要 |
Apparatus suitable for gas sampling comprises a housing 2a, a probe 1 arranged to pass through a port 3 in the housing and means for providing an inert gas atmosphere adjacent to the port 10 at greater pressure than the exterior of the housing. The apparatus may comprise chamber 10 which is supplied inert gas via a conduit 8. The apparatus may comprise a piston 4 arranged to push the probe 1 through the port 3 to an operating position. The piston may be a pneumatic piston operated by inert gas. The piston and the chamber may be pressurised and depressurised independently of one another. The surface of the port (12) may be tapered and may comprise a disposable insert in the housing. The probe may measure gas temperature and pressure and may be used to collect furnace gas for subsequent analysis. The apparatus may be suitably used with nitrogen gas and may be useful in the sampling of gases in dirty environments (e.g. a blast furnace). The apparatus may solve the problem of dirt and grit contaminating the probe. |
