Conductivity Probe

The Conductivity Probe determines the ionic content of an aqueous solution by measuring its conductivity. This has many applications in chemistry, biology, and environmental science.


The Conductivity Probe has three ranges, providing optimal precision in any given range. Biology teachers can use this probe to demonstrate diffusion of ions through membranes. Chemistry students are able to quickly investigate the difference between ionic and molecular compounds, strong and weak acids, or ionic compounds that yield different ratios of ions. Environmental science students use it to measure TDS, total dissolved solids.

Additional Features

  • Fast response time: Reaches 98% of full value in less than 5 seconds.
  • Quick and easy calibration using our software.
  • Built-in temperature compensation allows you to calibrate the probe in the lab, and then make measurements outdoors without temperature changes affecting data.
  • Alternating current at its electrodes preventing polarization and electrolysis, reducing contamination of solutions.
  • ABS-body graphite electrode eliminates worry about corrosion of metal electrodes.

Sample Data

Diffusion through membranes


  • Range:
    • Low Range: 0 to 200 μS/cm (0 to 100 mg/LTDS)
    • Mid Range: 0 to 2000 μS/cm (0 to 1000 mg/LTDS)
    • High Range: 0 to 20,000 μS/cm (0 to 10,000 mg/LTDS)
  • Typical Resolution:
    • Low Range: 0.1 μS/cm (0.05 mg/LTDS)
    • Mid Range: 1 μS/cm (0.5 mg/LTDS)
    • High Range 10 μS/cm (5 mg/LTDS)
  • Accuracy using factory calibration:
    • ±8% of full-scale reading for low range
    • ±3% of full-scale reading for mid range
    • ±4% of full-scale reading for high range
  • Accuracy using custom calibration: ±2% of full-scale reading for each range
  • Response Time: 98% of full-scale reading in 5 seconds, 100% of full-scale in 15 seconds
  • Temperature Compensation: automatic from 5 to 35 °C
  • Temperature Range (can be placed in): 0 to 80 °C
  • Cell Constant: 1.0 cm-1
  • Description: ABS body, parallel carbon (graphite) electrodes
  • Dimensions: 12 mm OD and 150 mm length

View the Conductivity Probe user manual

What’s Included

  • Vernier Conductivity Probe
  • 90 mL bottle of 1000 µS/cm NaCl standard solution