Abstract: The present disclosure describes a measuring system, comprising: a housing; a first chamber formed in the housing; arranged in the first chamber, a measuring cell, which includes a container embodied for receiving an electrolyte and at least one electrode for potentiometric and/or amperometric measurements, wherein the at least one electrode has a first section, which is arranged within the container, and a second section, which extends out from the container into the first chamber; and a temperature regulating apparatus, which is embodied to produce a temperature-controlled gas stream moving through the first chamber and flowing around the measuring cell, especially the container and the section of the at least one electrode extending from the container lid into the first chamber.

Abstract: The present disclosure relates to a combustion tube for a device for elemental analysis of a sample, comprising an outer tube including an outlet and an inner tube including an inlet, the inner tube detachably insertable into the outer tube, wherein the outer and inner tubes are arranged such that the sample passes through the inlet, through the inner tube into the outer tube, and out of the combustion tube through the outlet, wherein the inner and outer tubes are configured such that, at least in a region in which the inner tube is surrounded by the outer tube, the sample is essentially inside the inner tube. The outer tube is made of a quartz glass, and the inner tube is made of a ceramic. The present invention further relates to a device for elemental analysis of a sample comprising a combustion tube according to the present disclosure.

Abstract: An analytical device for determining a measured variable dependent on the concentration of one or more constituents of a sample includes a decomposition reactor surrounded by an insulating tube, a heating apparatus, an oxygen production system including at least one oxygen permeable membrane, a housing, and a feed gas guiding system for supplying a feed gas to the at least one membrane of the oxygen production system. The feed gas guiding system includes a reaction space surrounding the at least one membrane and is connected with an inflow duct open to the environment such that at least two partitions are arranged coaxially within the insulating tube and surrounding the decomposition reactor, where the partitions subdivide an intermediate space arranged between the decomposition reactor and the insulating tube into annular chambers forming the feed gas guiding system, where the annular chambers are connected with one another by overflow openings.

Abstract: The invention relates to an analysis device for determining a measurement variable based on the concentration of one or more contents of a sample, comprising: a digestion reactor with a gas inlet and a gas outlet; a measuring device which is connected to the gas outlet of the digestion reactor; a control and analysis device which is designed to receive and process measurement values that are registered by the measuring device and are based on the measurement variable; an oxygen generating device; and a gas line system which connects the oxygen generating device to the gas inlets of the digestion reactor in order to supply oxygen generated by the oxygen generating device to the digestion reactor, wherein the gas line system comprises a gas storage device which has at least one chamber with a variable volume for receiving an oxygen quantity to be stored.

Abstract: The present disclosure relates to a combustion tube for a device for elemental analysis of a sample, comprising an outer tube including an outlet and an inner tube including an inlet, the inner tube detachably insertable into the outer tube, wherein the outer and inner tubes are arranged such that the sample passes through the inlet, through the inner tube into the outer tube, and out of the combustion tube through the outlet, wherein the inner and outer tubes are configured such that, at least in a region in which the inner tube is surrounded by the outer tube, the sample is essentially inside the inner tube. The outer tube is made of a quartz glass, and the inner tube is made of a ceramic. The present invention further relates to a device for elemental analysis of a sample comprising a combustion tube according to the present disclosure.

Abstract: The invention relates to an analysis device for determining a measurement variable based on the concentration of one or more contents of a sample, comprising: a digestion reactor with a gas inlet and a gas outlet; a measuring device which is connected to the gas outlet of the digestion reactor; a control and analysis device which is designed to receive and process measurement values that are registered by the measuring device and are based on the measurement variable; an oxygen generating device; and a gas line system which connects the oxygen generating device to the gas inlets of the digestion reactor in order to supply oxygen generated by the oxygen generating device to the digestion reactor, wherein the gas line system comprises a gas storage device which has at least one chamber with a variable volume for receiving an oxygen quantity to be stored.

Abstract: An analytical device for determining a measured variable dependent on the concentration of one or more constituents of a sample includes a decomposition reactor surrounded by an insulating tube, a heating apparatus, an oxygen production system including at least one oxygen permeable membrane, a housing, and a feed gas guiding system for supplying a feed gas to the at least one membrane of the oxygen production system. The feed gas guiding system includes a reaction space surrounding the at least one membrane and is connected with an inflow duct open to the environment such that at least two partitions are arranged coaxially within the insulating tube and surrounding the decomposition reactor, where the partitions subdivide an intermediate space arranged between the decomposition reactor and the insulating tube into annular chambers forming the feed gas guiding system, where the annular chambers are connected with one another by overflow openings.