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    • Main Office
      Burkert New Zealand Ltd.
      44 Rennie Drive, Airport Oaks
      Auckland 2022 New Zealand
      Phone +64 9 256 7737
      Fax +64 9 256 7747
      E-Mail fnyrf.am@ohexreg.pbz
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pH measurement

Measuring principle pH value

The hydrogen ion concentration (actually referred to as pH value) in an aqueous solution generates a potential difference at a measuring electrode (pH-sensitive glass diaphragm) with respect to a reference electrode (Ag/AgCl). This voltage is measured by a high-impedance pH measuring instrument and converted to a pH value. The relationship between pH value and voltage is linear, with a slope of 59.16 mV/pH value. The slope is temperature-dependent and is compensated for by an integrated temperature sensor.

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