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    • Main Office
      Burkert Contromatic Corp. US Headquarters
      11425 Mt. Holly-Huntersville Road
      Huntersville, NC 28078
      Phone +1 800 325 1405
      Fax +1 949 223 3198
      E-Mail znexrgvat-hfn@ohexreg.pbz
    • Office
      Sales Office - West Coast Burkert Contromatic Corp.
      2572 White Road
      Irvine, CA 92614
      Phone +1 800 325 1405
      Fax +1 949 223 3198
      E-Mail znexrgvat-hfn@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.