Use the Ammonium ISE to measure levels of ammonium ions introduced from fertilizers. It can also indicate aqueous ammonia levels if sample solutions are acidified to convert NH3 to NH4+.
The Ammonium ISE has a combination-style, non-refillable, gel-filled electrode. Like all other PVC ISE membranes, the membrane on the ISE has a limited life expectancy. However, the replaceable module of ISE allows you to simply discard the used membrane module, and replace it with a new one.
Note: We recommend that you do not purchase ISE replacement modules too far in advance of their expected time of use as degradation occurs while they are stored on the shelf.
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.
Download the user manual for full specifications
- Range: 1 to 18,000 mg/L or ppm
- Accuracy: ±10% of full scale (calibrated 1 to 100 mgL)
- pH range: 4 to 7.5
- Interfering ions: K+
- 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
Experiments and Lab Ideas
Water Quality with Vernier (1)
Includes student instructions, teacher tips, safety information, and sample data.Go to Book Page
Lab Ideas and Innovative Uses
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The Ammonium Ion-Selective Electrode may require a compatible interface and software. Choose a platform below to see compatible interface and software options.
The Ammonium Ion-Selective Electrode is fully supported with LabQuest 2 (version 2.7.1), a standalone data logger with built-in graphing and analysis software.
Learn more about LabQuest 2 »
You can also use the Ammonium Ion-Selective Electrode with these platforms:
- Vernier Ammonium Ion-Selective Electrode
- 30 mL bottle of Ammonium Low Standard (1 mg/L)
- 30 mL bottle of Ammonium High Standard (100 mg/L)
- Short-term ISE soaking bottle
- User manual
All prices are for U.S. educators.
Educational use only: Vernier products are designed for educational use. They are not appropriate for industrial, medical, or commercial applications. Product usage disclaimer »