Gas particle concentration measuring device for fluid operated system, has slider movable between position, in which filter insert is accessible from outside of pipe lines and another position, in which insert is provided between lines

The device has a filter (54) inserted in a filter retainer that is formed in a filter insert (50), where the filter insert is inserted into a slider (40). The slider is movable between a position, in which the filter insert is freely accessible from outside of supply and discharge pipe lines, and another position, in which the filter insert is provided axially between the pipe lines. The pipelines with flanges are accommodated at the insert by axial force impacts. Zur Messung der Partikelkonzentration in Gasen wird das Gas durch eine zuführende Leitung (26), durch einen Filter (54) und eine abführende Leitung geführt. Wenigstens ein Filter (54) ist auswechselbar in einen Filtereinsatz (50) eingesetzt, der mittels eines Schiebers (40) zwischen Flansche (14, 24) der gasführenden Leitungen verschiebbar ist. Der Filtereinsatz (50) wird mittels Exzenterhebeln (36) abdichtend zwischen den Flanschen (14, 24) verspannt.