Radiant energy – Invisible radiant energy responsive electric signalling – Infrared responsive
Patent
1996-08-07
1998-03-31
Glick, Edward J.
Radiant energy
Invisible radiant energy responsive electric signalling
Infrared responsive
25033912, 25033913, 250343, G01N 2117, G01N 2135
Patent
active
057341656
ABSTRACT:
Gases can be selectively detected by utilization of an infrared (IR) absorption photometer via their specific absorption in the IR range. Known instruments are generally rather expensive, are of considerable size, require careful treatment and as a rule can be operated by skilled personnel only. The microstructured IR absorption photometer of the present invention is developed for (quasi-) continuously controlling a gaseous stream, the photometer being a single-piece shaped part manufactured as a microstructured body. The photometer is compact and robust, suitable for portable instruments and can be manufactured at low cost and in large numbers. The photometer can be made of metal and can be used even at an increased temperature. A flashlight lamp serves as an IR radiation source and a lead selenide receiver as an IR radiation receiver. The pulse repetition frequency of the flashlight lamp is from 0.01 Hz to 10 Hz. The pulse interval preferably amounts to more than a thousand times the pulse duration. By using the inventive photometer the safety of systems in which flammable, toxic, or other gases are contained or may occur can be considerably increased in an economic manner.
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Durselen Lothar E.
Landwehr Dierk
Pannhoff Helge
Unal Nezih
Glick Edward J.
Huels Aktiengesellschaft
Microparts Gesellschaft Fuer Mikrostrukturtechnik mbH
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