This Adaptor  used in combination with a pH electrode to form the immensely popular pH sensor which is used in a lot of investigations in general science, chemistry, biology and environmental science.



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Activities and Curriculum: 

5 Minute Datalogger Activites CLICK HERE for Sample

High School Chemistry Investigation with Dataloggers CLICK HERE for Sample

High School Biology Investigation with Dataloggers CLICK HERE for Sample


  • Testing acids and alkalis
  • Acid-Base titrations
  • Acid rain


  • Dissolved Oxygen in water
  • Enzyme action
  • Cell respiration
  • Human respiration
  • Photosynthesis and respiration


  • Water quality

This sensor has two ranges:

  • The Default calibration – the stored pre-set calibration suitable for most experiments.
  • The User calibration – the calibration can be adjusted using the Sensor Config application in the EasySense software to take into account different temperatures (above or below 25°C) or deterioration of an electrode.​
  • Works with the following Dataloggers:

VHub4 and VHub8


pH Electrode (2251) Pack

  • 0 to 14 pH (Resolution 0.01 pH)​