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Vernier Vernier Ammonium Ion-Selective Electrode Products for Science Education

To measure the concentration of Ammonium (NH4+ in aqueous samples.

Manufacturer:  Vernier NH4BTA

Catalog No. S16214ND

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Includes: Ammonium ISE, 30mL bottle of Ammonium Low Standard (1mg/L), 30mL bottle of Ammonium High Standard (100mg/L), Short-term ISE soaking bottle, user manual.



  • Measure ammonium ions introduced from fertilizers
  • Also indicates aqueous ammonia levels if sample solutions are acidified to convert NH3 to NH4
  • Combination-style, non-refillable, gel-filled electrode
  • Replaceable PVC membrane with limited life expectancy
  • Compatible Interfaces: LabQuest™ 2, Original LabQuest, LabQuest Mini, Go!Link™, SensorDAQ™, LabPro™, EasyLink™, CBL2™, TI-Nspire Lab Cradle™
  • Range: 1 to 18,000mg/L or ppm
  • Accuracy: ±10% of full scale (calibrated 1 to 100mg/L)
  • pH Range: 4 to 7.5
  • Interfering Ions: K+
  • Electrode Slope (log voltage vs. concentration): +56mV/decade
  • Electrode resistance: 1 to 4MOhm
  • Temperature Range: 0° to 50°C
  • Minimum Immersion: 1.1 in.
  • Electrode Length: 155mm
  • Body Diameter: 12mm
  • Cap Diameter: 16mm
  • Cable Length: 100cm
Not recommended for middle school or elementary students.

Order Info

Interface and software sold separately.

Warranty and Services

Five years on electrode and one year on module.



6.1 in.
0° to 50°C
Measuring ammonium ions introduced from fertilizers
4 to 7.5
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