Apparatus for sampling gas from a hot dust-filled gas stream

A gas sampling probe for sampling gas from a hot dust-filled gas stream wherein the probe has an end facing away from the gas-filled atmosphere which is connected to a gas pump for establishing a gas flow through the probe, said probe being provided with a separate gas sampling outlet for samplings a portion of the gas, the sample being fed from the probe to an analysis apparatus for further examination, and wherein the probe comprises three successively connected pipe sections of a heat-resistant material, a first pipe section comprising a gas inlet section, a second pipe section comprising a filter section having pipe walls of a ceramic porous material, and a third pipe section comprising a gas outlet section to which the gas pump is connected by means of a conduit, and wherein the second pipe section along the entire pipe periphery is surrounded by a filter housing which at both ends is connected in a gas-proof manner to the exterior of the adjacent ends of the first section and of the third section, respectively, to which filter housing the gas sampling outlet is connected, characterized in that the probe is provided with a device for activating the dust inside the internal probe area, said device comprising at least one of a laser emitter or means for deionization of the dust particles prior to filtration of the sample in the probe.