Ammonium Ion-Selective Electrode
Recommended for College and High School. Interface and software sold separately.
The Ammonium Ion-Selective Electrode (ISE) can be used to measure the concentration of Ammonium (NH4+) in aqueous samples.
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.
- Range: 0.10 to 18,000 mg/L or ppm (5.5 × 10-6 M to 1.0 M)
Resolution (LabQuest 2, LabQuest, LabQuest Mini, Go!Link, LabPro):
- % of reading: 0.7%
- Low scale reading: 1.8 ±0.013
- High scale reading: 35,500 ±250 mg/L
- pH Range: 4 to 7.5
- Interfering Ions: K+
- Electrode Slope (log voltage vs. concentration): +56 mV/decade
- Electrode Resistance: 1 to 4 MΩ
- Reproducibility: ± 5% of reading
- Temperature range (can be placed in): 0 to 50°C (no temperature compensation)
- Minimum immersion: 1 inch
- Electrode Length: 155 mm
- Body Diameter: 12 mm
- Cap Diameter: 16 mm
- Cable Length: 100 cm
Download the user manual for full specifications
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
The Ammonium Ion-Selective Electrode requires a compatible interface and software to collect data. Interface and software sold separately. Getting started with probeware »
The Ammonium Ion-Selective Electrode is compatible with these interfaces:
Educational use only: Vernier products are designed for educational use. They are not appropriate for industrial, medical, or commercial applications. Product usage disclaimer »