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Flat pH Electrode BNC

Flat pH Electrode BNC

Flat pH Electrode BNC


Connect the Flat pH Electrode BNC to one of our electrode amplifiers to measure the pH of solutions containing sulfides or of semisolids, such as food and soil slurries. The flat glass membrane also makes it a great option if you require a durable pH bulb.



The glass membrane is flat instead of a bulb, making it more durable, easier to clean, and allows for flat surface measurements or smaller sample sizes. It features a sealed, gel-filled, double-junction electrode, making it compatible with Tris buffers and solutions containing proteins or sulfides. The flat glass shape also makes it useful for measuring the pH of semisolids such as food or soil slurries.


  • Range: pH 0–14 (Some sodium error in ranges greater than pH 12 due to thicker glass and higher impedance values)
  • Electrode type: Double-junction, sealed, gel-filled, Ag/AgCl reference, polycarbonate body
  • Membrane style: Flat glass
  • Storage solution: pH 4/KCl solution (10 g KCl in 100 mL buffer pH-4 solution)
  • Cable: 1 meter coaxial cable with BNC connector
  • Temperature range:

    • 0– 100ºC
    • 12 mm OD
    • Impedance: ~20 kΩ at 25ºC
  • Response time: 98% of full response in 30 s at 25ºC

The Flat pH Electrode BNC connects via BNC to one of our Electrode Amplifiers.

What's Included

  • Vernier Tris-Compatible Flat pH Electrode BNC
  • pH Storage Solution



5-year limited warranty
See our warranty policy

Replacement Parts

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