Method and apparatus for measuring the concentration of a gas
    1.
    发明授权
    Method and apparatus for measuring the concentration of a gas 有权
    用于测量气体浓度的方法和装置

    公开(公告)号:US06455000B1

    公开(公告)日:2002-09-24

    申请号:US09350929

    申请日:1999-07-12

    IPC分类号: G01N2558

    CPC分类号: G01N25/36 G01N25/34

    摘要: A method and apparatus using thermomechanical means for signalling the concentration of a reactive gas is disclosed. The thermomechanical means uses movement of a mechanical member to produce a signal corresponding to the concentration of the reactive gas in a gas stream. The method and apparatus may include means for converting a specific gas in a gas stream to a reactive gas. The apparatus may then provide an analog readout of the concentration of the specific gas.

    摘要翻译: 公开了一种使用热机械装置来表示反应气体的浓度的方法和装置。 热机械装置使用机械构件的运动来产生对应于气流中的反应气体的浓度的信号。 该方法和装置可以包括用于将气流中的特定气体转化为反应性气体的装置。 然后,该装置可以提供特定气体的浓度的模拟读数。

    Trace detection of chemical compounds via catalytic decomposition and redox reactions

    公开(公告)号:US11703471B1

    公开(公告)日:2023-07-18

    申请号:US16724068

    申请日:2019-12-20

    摘要: Methods and apparatuses for highly sensitive detection of analytes using redox reactions. A library of heat reactions of analytes of interest with a variety of catalysts at a variety of temperatures is prepared. An array of sensors with low thermal mass heating elements is prepared, depositing the same or different catalysts, such as metal oxide catalysts that have multiple oxidation states, on each heating element. The low thermal mass heating elements are preferably not in thermal contact with a substrate, or a low mass substrate is used. The array is exposed to a sample at various temperatures. The sign and magnitude of the heat effect of the redox reaction of compounds in the sample or their decomposition products with each catalyst is measured and compared with the library. The catalysts and temperatures are chosen so that the desired analytes have a unique pattern of heat effect signs and magnitudes when reacted with those catalysts at those temperatures. The resulting detector is highly selective and sensitive to the analytes of interest.