Abstract: A method for recognizing sensor poisonings in portable gas-measuring devices with a test station having a main unit with a control and analysis unit and test modules connected with the main unit for data exchange with an connected device. The test station recognizes device model and/or gas sensor model of the connected device. The main unit has gas inlets for different test gases and there is a first gas feed line for sending test gas to the test modules and a second gas feed line for sending purging gas to the test modules and a gas drain line to return gas from the test modules to the main unit. The method includes detection of a first measured value and of a second measured value and determination of sensor poisoning on the basis of the two values. The test station control and analysis unit carries out the method.

Abstract: A method for recognizing sensor poisonings in portable gas-measuring devices with a test station having a main unit with a control and analysis unit and test modules connected with the main unit for data exchange with an connected device. The test station recognizes device model and/or gas sensor model of the connected device. The main unit has gas inlets for different test gases and there is a first gas feed line for sending test gas to the test modules and a second gas feed line for sending purging gas to the test modules and a gas drain line to return gas from the test modules to the main unit. The method includes detection of a first measured value and of a second measured value and determination of sensor poisoning on the basis of the two values. The test station control and analysis unit carries out the method.

Abstract: A process for enriching substance emissions released from an object in the form of gases, vapors or aerosols, wherein the substance emissions are fed to an adsorption layer by diffusion or penetration and are enriched in the adsorption layer. The substance emission of an object is selectively detected according to the present invention by the adsorption layer being fixed on the surface of the object emitting pollutant, which surface is to be analyzed, by means of an adhesive tape projecting over the adsorption layer on all sides to offer adhesive surfaces for application to the object and to hermetically seal the adsorption layer against the ambient air. A nondestructive adsorption system is also provided, with direct or immediately following analysis for the rapid qualitative and/or quantitative determination of pollutants (e.g., gases, vapors, dusts) by means of a chemical or biological reaction, in which, e.g.