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    • 3. 发明申请
    • SENSOR
    • 传感器
    • WO2009136190A1
    • 2009-11-12
    • PCT/GB2009/050466
    • 2009-05-06
    • OWLSTONE LTD.KOEHL, Andrew
    • KOEHL, Andrew
    • G01N27/66
    • G01N27/66
    • A method and sensor for monitoring chemical species in a gas flow are described. An ionised sample of gas is passed through a flow channel, with a DC electric field applied transverse to the longitudinal axis of the channel. Any electric current produced by the ion flow is measured, with variations in the current being indicative of a change in composition of the gas flow. In certain embodiments, the DC field may be varied over time, to sweep the field voltage. The detected current against field voltage graph may be taken as a profile of a particular gas composition. Variations in the profile again are indicative of a change in gas composition.
    • 描述了用于监测气流中的化学物质的方法和传感器。 气体的电离样品通过流动通道,其中DC电场横向于通道的纵向轴线施加。 测量由离子流产生的任何电流,其中电流的变化表示气流的组成变化。 在某些实施例中,DC场可以随时间变化,以扫描场电压。 检测到的电场电压图可以视为特定气体组成的轮廓。 轮廓的变化再次表明气体成分的变化。