Abstract: A measuring arrangement for detecting trace gases in a sample gas, the measuring arrangement includes at least one narrow-band excitation light source; first and second chambers, wherein the excitation light is emitted into the chambers; a scrubber, wherein trace gases are removed from the sample gas as it passes between the first and second chambers; at least one narrow-band measurement light source arranged such that the measurement light hits the excitation light in the first chamber and second chambers; a detector unit which is in optical contact with the first and second chambers and detects the measurement light from the first and second chambers and converts it into a first and a second electrical signal; and a data processing unit which calculates the amount of trace gases in the sample gas from the first and second electrical signals. The present disclosure also discloses an alternative measuring arrangement and method.

Abstract: A measuring arrangement for detecting trace gases in a sample gas, the measuring arrangement includes at least one narrow-band excitation light source; first and second chambers, wherein the excitation light is emitted into the chambers; a scrubber, wherein trace gases are removed from the sample gas as it passes between the first and second chambers; at least one narrow-band measurement light source arranged such that the measurement light hits the excitation light in the first chamber and second chambers; a detector unit which is in optical contact with the first and second chambers and detects the measurement light from the first and second chambers and converts it into a first and a second electrical signal; and a data processing unit which calculates the amount of trace gases in the sample gas from the first and second electrical signals. The present disclosure also discloses an alternative measuring arrangement and method.

Abstract: The present disclosure includes a method for determining the necessity of a measure and/or the success of a measure in the case of a sensor in a retractable assembly, comprising the steps: moving the sensor in the direction of a service chamber of the retractable assembly; analyzing an attribute associated with the sensor, wherein the attribute is a state of at least a portion of the surface of the sensor and/or composition of a medium in the service chamber; and deriving measures from the analysis. The present disclosure also includes a system comprising a retractable assembly having a sensor and a corresponding analysis device.

Abstract: The present disclosure includes a method for determining the necessity of a measure and/or the success of a measure in the case of a sensor in a retractable assembly, comprising the steps: moving the sensor in the direction of a service chamber of the retractable assembly; analyzing an attribute associated with the sensor, wherein the attribute is a state of at least a portion of the surface of the sensor and/or composition of a medium in the service chamber; and deriving measures from the analysis. The present disclosure also includes a system comprising a retractable assembly having a sensor and a corresponding analysis device.

Abstract: An embodiment of the invention generally relates to an FET-based detector for carbon monoxide which is based on two sensitive layers. In at least one embodiment, the first of the sensitive layers is catalytically active and therefore reacts equally to alcohols, in particular ethanol, and carbon monoxide. The second of the sensitive layers is not catalytically active and therefore does not react to carbon monoxide, but only to ethanol. The concentration of carbon monoxide can be deduced from the comparison of the signals of the two layers. The two sensitive layers are implemented via similar metal oxide layers, an additional layer having a catalyst such as palladium being provided for the catalytically active layer. Alternatively, two different layers can be used, one of which is already catalytically active without an additional layer.

Abstract: A tobacco smoke detector has a gas-sensitive semiconductor sensor device (in particular, GasFET sensor) with a first gas-sensitive layer which reacts to tobacco smoke and a second gas-sensitive layer which reacts to fire products. An evaluation unit (e.g. microchip) analyzes the signals supplied by the first and the second gas-sensitive layer and determines whether tobacco smoke is present. Optionally, the tobacco smoke detector contains an interface for providing a connection using signals or data technology to a hazard detector and/or a hazard control unit and/or an output device, in particular for transmitting information as to whether tobacco smoke is present. Optionally, the tobacco smoke detector can be operationally integrated into a conventional hazard detector (e.g. fire alarm).

Abstract: An embodiment of the invention generally relates to an FET-based detector for carbon monoxide which is based on two sensitive layers. In at least one embodiment, the first of the sensitive layers is catalytically active and therefore reacts equally to alcohols, in particular ethanol, and carbon monoxide. The second of the sensitive layers is not catalytically active and therefore does not react to carbon monoxide, but only to ethanol. The concentration of carbon monoxide can be deduced from the comparison of the signals of the two layers. The two sensitive layers are implemented via similar metal oxide layers, an additional layer having a catalyst such as palladium being provided for the catalytically active layer. Alternatively, two different layers can be used, one of which is already catalytically active without an additional layer.