Proengin Sa

Etat Francais

L'etat Francais, Represente Par Le Delegue General Pour L'armement

Patrick Bleuse

Gilles Guene

Pierre Clausin

Henri Lancelin

Pierre Suzanne

Christian Heurtel

Eric Wurmser

The sampling system of the invention includes a column comprising a first separator associated with a first collector so as to extract particles whose diameter is larger than a first diameter, and a second separator associated with a second collector which eliminates the finest particles and concentrates the other particles in the gas flow sucked up by the suction pipe of an analysis device.

System for taking a gas sample able to contain particles of suspended materials

The present method uses a spectrophotometric and/or ionisation detection device in which the gas to be analyzed and illuminated by a light source emitting in a range of wavelengths distinct from the one used for spectrophotometry so as to carry out a nephelometric and/or turbidimetric detection, the results of this detection being used to carry out an adjustment of the device for counting the particles and/or for determining the composition of these particles.

Method and device for analysing a gas likely to contain particles or suspended aerosols

The invention concerns an apparatus comprising an intake scoop (,) for the gas sample to be analyzed and, coaxial to said scoop (,): two tubular sleeves (,) defining respectively an intake chamber (,) for an oxygen carrier gas opening into a first combustion chamber (,), and an intake chamber (,) for an oxidant gas opening into a second combustion chamber (,); a pair of electrodes (,) associated with a circuit (,) measuring the conductivity of a combustion zone located in the second combustion chamber (,) and focusing optics (,) focusing the image of the flame generated in the combustion chambers (,) on the input orifice of a spectrophotometer (,); a processor (,) processes the data from the circuit (,) and from the spectrophotometer (,) to deduce therefrom the concentration in the searched elements. The invention is particularly useful for detecting sulphur, phosphorus and organic compounds.

Apparatus combining spectrophotometry and flame ionisation detection for analysing a gas composition

A device for continuous analysis of the composition of a gaseous atmosphere containing particles of material in suspension includes a burner equipped with a prism; an intensifier which produces an intensified image of the spectrum produced by the dispersive component on photodiodes; a register which stores data detected by the photodiodes; a microcomputer which periodically reads the register and compares the data read with reference data to identify the elements looked for; and a counter which counts the number of times that the same component is identified per unit time in order to determine the number of particles per unit volume. The device can be implemented in the form of a portable, self-contained apparatus.

Method and device for continuous analysis of the composition of a

A burner is disclosed which can be used in an apparatus for analyzing a gas omposition by flame spectrophotometry, comprising, disposed coaxially with each other, a tubular body having an open end on which an optical system is mounted coaxially, a sample taking nozzle which extends the body while defining an intake chamber, a collar fast with the body through which passes a tubular chimney, a nozzle for intake of the gas composition which is fitted in the chimney while forming therewith an annular intercalary chamber into which opens a fuel gas intake duct and a capillary tube for intake of the gas composition to be analyzed, this capillary tube being connected to the intake duct at the level of its end situated in the intake chamber.

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Le Quesnoy, France

Patrick Bleuse