Vernier Software and Technology
Vernier Software & Technology

Chloride Ion-Selective Electrode

Chloride Ion-Selective Electrode product image

The Chloride Ion-Selective Electrode (ISE) is used to measure the concentration of Chloride (Cl-) in aqueous samples.


The concentration of the Chloride ion gives a quick measurement of salinity of water samples. Use the Chloride ISE to measure chloride levels in ocean saltwater or salt in food samples.

The Chloride ISE has a combination-style, non-refillable, gel-filled electrode. Unlike other ISEs available from Vernier, the Chloride ISE has a solid-state membrane that does not need to be replaced.

Important: Ion-Selective Electrodes require good chemical technique and careful calibration to obtain accurate results; they are not recommended for middle school or elementary students.



  • Range: 1 to 35,000 mg/L or ppm
  • Accuracy: ±10% of full scale (calibrated 10 to 1000 mg/L)
  • pH range: 2 to 12
  • Interfering ions: CN, Br, I, S2-
  • Electrode slope (log voltage vs. concentration): –56 mV/decade
  • Electrode resistance: 1 to 4 MΩ
  • Temperature range (can be placed in): 0 to 50°C (no temperature compensation)
  • Minimum immersion: 1.1 inch
  • Electrode length: 155 mm
  • Body diameter: 12 mm
  • Cap diameter: 16 mm
  • Cable length: 100 cm
View the Chloride Ion-Selective Electrode user manual

Experiments and Lab Ideas

Lab Ideas and Innovative Uses

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Compatibility Requirements

The Chloride Ion-Selective Electrode may require a compatible interface and software. Choose a platform below to see compatible interface and software options.

What’s Included

  • Vernier Chloride Ion-Selective Electrode
  • 30 mL bottle of Chloride Low Standard (10 mg/L)
  • 30 mL bottle of Chloride High Standard (1000 mg/L)
  • Short-term ISE soaking bottle
  • User manual

Ordering Information

All prices are for U.S. educators.

NameOrder CodePriceQuantity
Chloride Ion-Selective ElectrodeCL-BTA$199
Optional Accessories
Electrode SupportESUP$10


Related Products

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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