DISPOSITIF DE PRELEVEMENT AUTOMATIQUE SUCCESSIF EN LIGNE D'UNE SERIE D'ECHANTILLONS D'UN LIQUIDE A ANALYSER AINSI QUE PROCEDE MIS EN OEUVRE SUITE A L'UTILISATION DE CE DISPOSITIF

The method involves circulating a flow of liquid to be analyzed to change the liquid in a sample tank (2) in circulation position of a rotating valve (1) e.g. six-way valve. A closing valve (9) is opened to inject compressed gas in a filling circuit (7) for pressurizing a pneumatic buffer chamber (10) in a loading position of the valve (1). The sample volume is pushed to an analysis cell (3). The chamber pressure is controlled by a pressure sensor (11) to verify whether entire volume is transferred to the cell. The valve is moved to the circulation position when the transfer is terminated. An independent claim is also included for a device for in-line successive automatic taking of samples from liquid to be analyzed.