AN ARRANGEMENT AND METHOD FOR MEASURING THE GAS CONTENT IN THE HEAD SPACE OF A CLOSED CONTAINER AND AN AUTOMATIC FILLING AND/OR PACKAGING PLANT USING SUCH AN ARRANGEMENT
The present invention relates to a measuring group and method of the gas content in closed containers, as well as an automatic filling and/or packaging plant using such a group. In particular, the present invention relates to a measuring group of the gas content in closed containers (30, 30', 30", 130) made of optically transparent material at least at a portion of a head space (31, 131) of the same, which comprises at least one housing seat (14,114) of at least one portion of a head space (31, 131) of a closed container (30, 30', 30", 130) of such closed containers; at least one laser source (22, 122) for emitting a laser beam (20, 120) at a wavelength tuneable with an absorption wavelength of a gas contained in the head space (31, 131) of the closed container, the at least one laser source (22, 122) being positioned in such a way as to direct the laser beam (20, 120) towards the at least one housing seat (14, 114); and is characterised in that it comprises at least one delimiting surface (17, 18, 117) if th
