Leybold Aktiengesellschaft

Rosemount Gmbh & Co.

Ulrich Modlinski

Rudi Roess

Gerhard Wiegleb

Hans Krause

Michael Lehnert

A method for the direct presentation of a differential measured quantity, in particular, a differential gas concentration measurement, in terms of its correct physical unit is disclosed. A characteristic curve representing the output of a gas sensor detector as a function of gas concentration is obtained in an absolute coordinate system. A reference level at which the differential measurement is to occur is defined on this characteristic curve by a defined input or, respectively, output value. This reference level defines the origin of a differential coordinate system from which the differential measurement may be directly ascertained.

Method for the direct presentation of a differential measured quantity

A paramagnetic gas measuring device/instrument including an infrared radiator for irradiating diamagnetic members of the device and for creating a climate within a measuring chamber suitable to evaporate moisture from the members and a gas being analyzed.

Method and apparatus for measuring a gas by exploiting the paramagnetic

In an infrared radiation source, especially for a multi-channel gas analyzer, a radiant body (3) is provided with a reflector (4) disposed behind it, and a window (5) of calcium-fluorite at least partially covering the radiant body (3) is provided, the radiant body (3) being partially surrounded at its rear by a cup-like case (6) whose circumferential margin is hermetically joined to the window (5) by an intermediate ring (19). The interior (7) of the radiant source can be pumped empty of air through a passage (8) in a tube connection (9) formed by the case (6) or provided with an oxidizing atmosphere, thereby achieving a high insensitivity to the position of the infrared radiation source.

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Alzenau-Albstadt, Germany

Ulrich Modlinski