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Tech Tip: Which pH Sensor Should I Buy?

Years ago, in simpler times, if you wanted to buy a pH sensor from Vernier, there was one choice—the Vernier pH Sensor. These days, you have five options (including, still, the Vernier pH Sensor). All of our pH sensors have similar accuracy, response, and sensitivity, so which one should you buy? It depends on how and where you plan to use your pH sensor. Here is some information to help you choose wisely.

Electrode Amplifier included? Features
pH Sensor
pH Sensor
Yes (built-in)
  • Best choice for general use
  • Measure pH in aqueous solutions (e.g., observe acid-base titrations, monitor an aquarium, or investigate water quality in a stream or lake)
pH Electrode BNC
pH Electrode BNC
No*
  • Detachable electrode makes replacement less expensive
  • Measure pH in aqueous solutions
Vernier Go Wireless® pH
Go Wireless<sup>®</sup> pH
Yes (detachable)
  • Collect pH data wirelessly
  • Measure pH in aqueous solutions
Tris-Compatible Flat pH Sensor
Tris-Compatible Flat pH Sensor
Yes (detachable)
  • Double-junction electrode allows measurement of the pH of solutions containing proteins, sulfides, or Tris buffers
  • Flat shape of the sensor tip makes it easy to clean, allows for smaller sample sizes, and measurement of pH of semisolids (e.g., food or soil slurries)
Glass-Body pH Electrode
Glass-Body pH Electrode BNC
No*
  • Measure the pH of aqueous and non-aqueous solutions
  • Can be used in solutions containing organic solvents and in highly concentrated acids or bases

* Electrode Amplifier or Go Wireless Electrode Amplifier is required


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