Vernier Software and Technology
Vernier Software & Technology

Go Direct® Flat pH BNC Electrode

Connect the Flat pH BNC Electrode to our Go Direct® Electrode Amplifier to measure pH of solutions containing proteins or sulfides.


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)
  • BNC connector
  • Temperature range:

    • 0– 100ºC (readings not compensated)
    • 12 mm OD
    • Impedance: ~20 kΩ at 25ºC
  • Response time: 98% of full response in 30 s at 25ºC


The Go Direct Flat pH BNC Electrode connects via BNC to our Go Direct Electrode Amplifier.

What’s Included

  • Go Direct Flat pH BNC Electrode
  • pH Storage Solution bottle with pH storage solution

Ordering Information

NameOrder CodePriceQuantity
Go Direct® Flat pH BNC ElectrodeGDX-FPH-BNC$68

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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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