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2001 series


REFEXTM 2001 Series 12mm pH Combination Electrode


Maintenance free REFEXTM 2001 Series electrodes are designed for pH measurement applications in many industries. 2001 Series combination electrodes feature the patented REFEX non-porous, hard ionically conductive interface/barrier to prevent reference electrode electrolyte loss and poisoning.


  • Measuring Method: pH/ reference combination electrode
  • Reference junction/Half cell: Ag/Agcl in KCI 2.8 mol/l (sealed for life)
  • Range: pH 0…12
  • Eo Zero vs Ag/AgCl: pH = 6.8 (+/- 20mV)
  • Impedance pH-glass/ref: 200MΩ Nom. /<100kΩ
  • Temperature Range: 0…100°C
  • Pressure Range: 0…20bar