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pH Meters

pH measuring instruments are used mainly in the chemical, pharmaceutical, environmental and food industries. In the Analytics shop you will find a large selection of different measuring instruments for the determination of the pH value. For example, WTW supplies high-quality solutions for pH measurement: The inoLab laboratory devices with IDS pH sensors provide the highest data quality and process signals directly in the sensor. Since the manufacturer WTW only uses DIN plugs and Mettler Toledo BNC plugs in our product portfolio, we carry in our assortment any adapters for the corresponding devices - so you do not have to compromise when purchasing a Mettler-Toledo or WTW product.

If you need a different pH meter, please feel free to contact us. Our customer service will be happy to advise you on any questions.

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pH meters

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  1. WTW

    pH/redox transmitter, digital

    sku: WW109170
  2. WTW

    Pocket pH meter pH 3110 SET 2

    sku: WW2AA112
  3. WTW

    Pocket pH meter pH 3310 SET 2

    sku: WW2AA312
  4. Mettler-Toledo


    sku: MR30019029
  5. Mettler-Toledo


    sku: MR30019032
  6. Mettler-Toledo

    SevenExcellence pH/mV meter S400,

    sku: MR30046241
  7. Mettler-Toledo

    Seven2Go pH/mV Meter S2-Field kit

    sku: MR30207951
  8. WTW

    digital pH/redox transmitter

    sku: WW109171
  9. WTW

    Digital pH/redox transmitter

    sku: WW109177
  10. WTW

    Standard-pH/Redox-fitting, 7m cable

    sku: WW109191
  11. WTW

    Case set for KS profiline pH

    sku: WW2A0001
  12. Mettler-Toledo

    pH-Gerät FiveGo, tragbar (Entry-Level)

    sku: MR30266946
  13. Mettler-Toledo

    SevenCompact, pH S220-Basic

    sku: MR30019028
  14. Mettler-Toledo


    sku: MR30019031
  15. Mettler-Toledo

    SevenExcellence pH/mV meter S400, meter

    sku: MR30046240
  16. Mettler-Toledo

    SevenExcellence pH/mV meter S400,

    sku: MR30046242
  17. Mettler-Toledo

    SevenExcellence pH/Ion meter S500,

    sku: MR30046248
  18. Mettler-Toledo

    SevenExcellence pH/Ion meter S500,

    sku: MR30046249
  19. Mettler-Toledo

    SevenExcellence pH/Ion meter S500

    sku: MR30046250
  20. Mettler-Toledo

    SevenExcellence pH/Ion meter S500

    sku: MR30046251
  21. Mettler-Toledo

    SevenExcellence pH/mV conductivity S470

    sku: MR30046252
  22. Mettler-Toledo

    SevenExcellence pH/mV conductivity S470

    sku: MR30046253
  23. Mettler-Toledo

    SevenExcellence pH/mV conductivity S470

    sku: MR30046254
  24. Mettler-Toledo

    SevenExcellence S475, pH/mV , Ion ,

    sku: MR30046255
  25. Mettler-Toledo

    SevenExcellence pH/mV S400-Micro Kit

    sku: MR30092982
  26. Mettler-Toledo

    SevenExcellence pH/mV S400-uMix Kit with

    sku: MR30092983
  27. Mettler-Toledo

    SevenExcellence pH/mV, cond., DO/BOD

    sku: MR30092988
  28. Mettler-Toledo

    SevenExcellence pH/ion, cond., DO/BOD

    sku: MR30092989
  29. Mettler-Toledo

    SevenCompact pH/Ion S220-Micro Kit with

    sku: MR30096985
  30. Mettler-Toledo

    SevenCompact pH/Ion S220-uMix Kit with

    sku: MR30096986
  31. Mettler-Toledo

    SevenCompact S210-Basic

    sku: MR30130862
  32. Mettler-Toledo

    Seven2Go pH/Ion Meter S8-Meter Seven2Go

    sku: MR30207874
  33. Mettler-Toledo

    Seven2Go pH/Ion Meter S8-Standard kit

    sku: MR30207875
  34. Mettler-Toledo

    Seven2Go pH/Ion Meter S8-Field kit

    sku: MR30207877
  35. Mettler-Toledo

    Seven2Go pH/Ion Meter S8-Biotech kit

    sku: MR30207878
  36. Mettler-Toledo

    Seven2Go pH/Ion Meter S8-Fluoride kit

    sku: MR30207879
  37. Mettler-Toledo

    Seven2Go pH/mV Meter S2-Meter Seven2Go

    sku: MR30207949
  38. Mettler-Toledo

    Seven2Go pH/mV Meter S2-Standard kit

    sku: MR30207950
  39. Mettler-Toledo

    Seven2Go pH/mV Meter S2-Food kit

    sku: MR30207952
  40. Mettler-Toledo

    Seven2Go pH/mV  Meter S2-Light kit

    sku: MR30207953
  41. Mettler-Toledo

    SevenCompact Duo pH/ cond benchtop meter S213-B

    sku: MR30339958
  42. Mettler-Toledo

    SevenCompact Duo pH/conductivity meter S213-Kit

    sku: MR30339959
  43. Mettler-Toledo

    SevenCompact Duo ph/cond benchtop meter S213-Water

    sku: MR30339980
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pH meters are used in many different areas. For instance in applications that require very accurate measurement results, particularly in the area of hygiene (food and beverage) they play an important role or even in demanding wastewater applications and pure and ultrapure water.

pH measurement with glass electrodes

pH meter with glass electrodes are the most commonly used measuring devices, therefore the said electrode is generally referred to as "pH-electrode". In this method the electric potential of the glass electrode is used which is directly dependent on the H+ ion concentration. Consequently the potential difference to the reference electrode resulting from the voltage reflects the pH level substantially linear. The so-called "reference electrode" is a silver-silver chloride half cell in most cases which is joined together with the pH electrode to a rod measuring chain


  • widespread method of pH level measurement


  • only slightly more resilient power can be generated, i.d. interference of the measurement by the flow potential is easily possible
  • calibration of both the zero point and the gain/ increase must be adjustable
  • the diaphragm can be contaminated or drained

pH measurement with field effect transistors

The second option is using pH meters with ion-sensitive field effect transistors (ISFET).


  • the pH values are more stable
  • retrofitted electronics show resistancy and sturdiness


  • number of possible measurement processes (= lifetime) is less
  • relatively unpopular type of pH measurement

pH measurement with hydrogen electrodes

Last but not least some more information about a traditional method of pH measurement: the use of hydrogen electrodes. This technique is based on the pH dependence of the hydrogen potential.


  • high mechanical stability
  • input resistance (impedance) is very low
  • no alkali error
  • no acid error


  • exhibit sensitivity to heavy metal salts (copper, silver, mercury)