G - Physics – 01 – N
Patent
G - Physics
01
N
73/104, 73/97
G01N 1/22 (2006.01)
Patent
CA 1066915
Abstract of the Disclosure Whilst exhaust tubes cooled by compressed air have proved to be satisfactory when the content of dust in hot gases is to be measured, and electrically heated exhaust tubes have proved to be satisfactory when the content of dust in comparatively cold and wet gases is to be measured, it is in practice not convenient to use different types of exhaust tubes in the two instances. The invention provides an apparatus for measuring the content of dust in gases which, without the necessity of exchanging the exhaust tube, may be used in both instances. The apparatus includes an exhaust nozzle adapted to be arranged in a duct through which the gas passes, a filter housing connected to the nozzle by means of an exhaust tube construction, and a source for delivering a medium to passages provided in the exhaust tube construction. Controllable heating means are provided for heating the medium between the source and the exhaust tube construction. By means of the apparatus according to the invention it is possible to analyse the gas irrespective of the condition thereof, viz. by heating the medium when comparatively cold and wet gases are to be analysed and by using the medium, e.g. air, in unheated condition when cooling is required.
243995
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