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    • 1. 发明授权
    • Device and process for measurement of the concentration of ions in a measurement liquid
    • 用于测量测量液体中离子浓度的装置和过程
    • US06853195B2
    • 2005-02-08
    • US10116113
    • 2002-04-05
    • Martin GehrkeDetlev Wittmer
    • Martin GehrkeDetlev Wittmer
    • G01N27/416
    • G01N27/4167
    • A symmetrically wired device and a process for measurement of the concentration of ions, especially hydrogen (H+) ions, in a measurement liquid. The device comprises a pH-sensitive measurement electrode, a reference electrode and a comparison electrode, all located in the measurement liquid and which places the measurement liquid at a definable ground reference. The device forms a difference signal referenced to the ground reference from the difference between a measurement signal (φpH) of the measurement electrode and the reference signal (φref) of the reference electrode. The difference signal is dependent on the ion concentration in the measurement liquid. The device compensates for the noise potential (φchem) arising between the comparison electrode and the measurement electrode by setting a reference potential (φbez) on the comparison electrode, such that φref assumes a zero value.
    • 对称布线装置和测量液体中离子浓度,特别是氢(H +)离子浓度的方法。 该装置包括pH敏感的测量电极,参比电极和比较电极,全部位于测量液体中,并将​​测量液体置于可定义的接地参考。 器件根据测量电极的测量信号(phipH)与参考电极的参考信号(phiref)之间的差异,形成参考接地参考的差分信号。 差分信号取决于测量液体中的离子浓度。 该装置通过在比较电极上设定参考电位(phibez)来补偿在比较电极和测量电极之间产生的噪声电位(phichem),使得phiref为零值。