Airsense Analytics Gmbh

Wma Airsense Analysentechnik Gmbh

Andreas Walte

Wolf Münchmeyer

Bert Ungethüm

Gerhard Matz

Wolf Munchmeyer

Torsten Hunte

Stefan Dohren

Bert Ungethuem

Oliver Rather

Alexander Harder

Mario Schmidt

Wolf Muenchmeyer

Jörg LÖBAU

Cordula Gotthardt

Bert Untgethuem

Method and device for identifying gases and/or ion mobility spectrometer and method for offsetting residual humidity are provided. The object of the invention is to develop a generic method for offsetting residual humidity in an ion mobility spectrometer and a related device, which has a simple structure and which fully exploits the reduced diffusion. This is achieved by a variable drift chamber drift gas velocity, which leads to differing penetration depths of the humidity into the drift chamber, and thus to variable residual humidities in the drift chamber. Methods of this type and the associated devices for detecting and identifying gases are used to recognise and identify chemical compounds, in particular explosive materials or material compounds and/or those which are damaging to health, and which must be identified in very low concentrations.

Method and device for the identification of gases

Methods and devices identify gases and allow immediate and simultaneous detection of the chemical compounds to be tested. The methods and devices use a function of the electric field strength, for identification the material-specific mobility and simultaneously the change in this mobility, which is achieved in that due to the resulting electric field, each ionized molecule has a drift velocity which is partially increased or decreased, wherein the resulting electric field is a DC field, on which an asymmetric AC field is superimposed. The methods and devices for the detection and identification of gases are used to identify and detect chemical compounds, such as, explosive and/or unhealthy substances or compounds, which may be detected in very small concentrations.

Method and device for detection and identification of gases

The concept underlying the invention is the development of a generic method for the detection and identification of gases in airplane interior spaces and an associated device, which is small and manageable, has a simple design, and allows the immediate and simultaneous detection and identification of the gases to be examined. This is achieved in that the supply air of the airplane interior space () is fed to a measuring device () and the measurement results of the measuring device () are analyzed by means of mathematical methods. Such methods and the associated devices for the detection and identification of gases in airplane interior spaces are used in order to spot and verify gases, particularly odors and explosive gases and/or gases harmful to people's health.

Method and device for the detection and identification of gases in airplane interior spaces

The invention relates to a method for identifying gases, which are ionized and the drift times of the positive and negative product ions through drift spaces are measured and the measured drift times are evaluated, wherein for measuring the drift times the product ions are accelerated to drift velocities by a resulting electrical field. It is provided that the positive and negative product ions move synchronously and in parallel in the same direction. The invention further relates to a device for identifying gases, which includes at least two drift tubes, wherein each of the drift tubes has at least one respective detector for detecting product ions. For this purpose, at least two drift tubes are arranged in parallel next to each other and are delimited, on one hand, by a common inlet system and, on the other hand, by at least one detector.

Method and apparatus for detecting and identifying gases by means of ion mobility spectrometry

The invention relates to a method for ionizing and identifying gases, wherein the gases to be identified are ionized in a reaction chamber and the product ions are measured, wherein the measurement of the product ions takes place via electrical fields acting on the product ions and the detection is performed with a detector for ions. It is provided that ionization takes place via UV radiation, and that simultaneously or sequentially ionization by electrons takes place. The invention further relates to a device for ionizing and identifying gases, which includes an ion source chamber having an ion source and an ion mobility spectrometer. For this purpose, a partition between the ion source chamber and the ion mobility spectrometer has a UV-transparent window and a window permeable for electrons, wherein UV radiation and electron radiation can be generated in the ion source chamber with the ion source.

Method and apparatus for ionizing gases using UV radiation and electrons and identifying said gases

The invention relates to a device () for detection of harmful substances with a measurement unit () for measuring at least one harmful substance and an evaluation unit () for determining the concentration of the at least one harmful substance. The invention also relates to a method for detecting harmful substances in a gas mixture. It is hereby provided that the gas mixture is tested for a gaseous harmful substance or simultaneously for several gaseous harmful substances, wherein the gaseous harmful substance or the gaseous harmful substances is/are measured with different sensor means, and the gaseous harmful substances are optionally chemically modified such that a measurement is performed with the existing sensor means.

Device and method for detection of harmful substances

A method and an arrangement detect harmful substances while eliminating or minimizing the drawbacks of an ion-mobility spectrometer (IMS). The sample gas flow is mixed with a reference gas utilizing a pump (). A reaction gas is supplied via a metering unit () to the ion-mobility spectrometer () when complex ion-mobility spectrometer spectra are present. The measurement signals obtained as to the gas-quantity ratio between the sample gas and the reference gas are adapted to the original concentration and are then compared to previously defined and stored measured values via a signal height comparison or a pattern recognition. The measuring system is rinsed following the measurement phase by feeding the reference gas and is cleaned by metering an additional cleansing gas when harmful substances are detected which could not be rinsed away. Such methods and measuring systems are used for identifying harmful substances in ambient air.

Method and arrangement for detecting harmful substances

The invention relates to a device for identifying gaseous compounds, comprising a sensor array ( ) having, for instance, ten gas sensors ( ) in the form of semiconductor gas sensors. Said sensor array ( ) has a supply line ( ) with an inlet ( ) and an outlet ( ). A switchable three-way valve ( ) is located in the supply line ( ), to which a selective collector unit ( ) is attached. Said collector unit ( ) comprises a special adsorber ( ), a heater ( ) and a separate feed pump ( ) with a flow sensor ( ). A secondary line ( ), in which a dilution unit ( ) is arranged, discharges into the feed line ( ) between the three-way valve ( ) and the sensor array ( ). A feeding and control unit ( ) also having a feed pump ( ) with a flow sensor ( ) is located in the area of the outlet ( ) of the sensor array ( ). An electrical line ( ) leading to an evaluation computer ( ) branches off from the sensor array ( ).

Method and device for identifying gaseous compounds

A method and apparatus for separating selected materials in a gas chromatograph. The gas mixture is introduced into a separation column of the gas chromatograph and the separation column is heated inside a chamber of the gas chromatograph to a preset temperature. The preset temperature is matched to the material to be separated and that heating is accomplished by using IR radiation.

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Schwerin, Germany

Andreas Walte