Vernier Software and Technology
Vernier Software & Technology

Potassium Ion-Selective Electrode BNC

Connect the Potassium Ion-Selective Electrode BNC to our electrode amplifiers to measure the potential (mV) and calculate the concentration of potassium (K+) ions in aqueous samples.


The Vernier Potassium Ion-Selective Electrode BNC Connector is a BNC-terminated electrode used to measure the concentration of potassium (K+) ions in aqueous samples. Use with Vernier interfaces requires the Electrode Amplifier. Also compatible with Go Direct® Electrode Amplifier.


  • Range (mV):
  • Range (concentration): 1 to 39,000 mg/L (or ppm)
  • Reproducibility (precision): ±30mV
  • Interfering ions: Cs+, NH4+, H+, Ag+, Li+, Na+
  • pH range: 2–12 (no pH compensation)
  • Temperature range: 0–40°C (no temperature compensation)
  • Electrode slope: +58 ±3 mV/decade at 25°C
  • Electrode resistance: 100–200 kΩ
  • Minimum sample size: must be submerged 2.8 cm (1.1 in)

Download the user manual for full specifications

What’s Included

  • Potassium Ion-Selective Electrode with BNC terminated end, packed with a storage bottle
  • 30 mL bottle of High Standard solution with SDS (1000 mg/L K+)
  • 30 mL bottle of Low Standard solution with SDS (10 mg/L K+)
  • Short-Term ISE Soaking Bottle


The Potassium Ion-Selective Electrode BNC connects via BNC to one of our Electrode Amplifiers.

Ordering Information

NameOrder CodePriceQuantity
Potassium Ion-Selective Electrode BNCK-BNC$187

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Educational use only: Vernier products are designed for educational use. They are not appropriate for industrial, medical, or commercial applications. Product usage disclaimer »

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