Ammonium Ion Selective Electrode (ISE)

Use ammonium ion selective electrode (ISE) to measure the NH4+ ion in aqueous solutions.

Ammonium ISE is a half-cell probe, and is able to detect ammonium ions. This type of ISE is all-solid state, based on the carbon nanotube technology. As  result, this sensor is built-up with robust body, solid-state and membrane selective area. Ammonia ion selective electrode is compatible for use with any Ion or mV meter and a reference electrode.

Above all, the ammonium sensor is ideal for measuring NH4+ concentrations in drinking water, tap water, wastewater and general water quality applications:

  • Unique solid-state sensor nanotechnology inside.
  • Requires virtually zero maintenance.
  • Provides fast, stable, and accurate response in a variety of sample types.
  • Replaceable sensor tip.


Range (concentration): 0,09 to 9000 mg/L  / 5×10-6 to 0,5 (mol/L)
Reproducibility (precision): ±10% of full scale (calibrated 10 to 1000 mg/L)
Interfering ions: K, Na, Mg2+, Ca2+
pH range: 4 to 8.5 (no pH compensation)
Temperature range: 4 – 40°C (no temperature compensation)
Electrode slope: 54 ±5 mV
Electrode resistance: 1–4 MΩ
Immersion minimum: 2 mm (without the protective cap)
Body diameter: see different sensors

ammonium single ion

Mini ION Ammonium

ISE Ammonium


Single Probe



ISE Ammonium meter + pH

The imacimus kit analysis system allows the direct measurement of the exact concentration of ammonium, thus giving rise to rapid analysis and greater reliability.

kit ammonium ion meter

Single probe Ammonium

Ammonium single ion


Single ION pH

pH single ion


Ammonium meter

pH Ammonium meter


USB cable

USB Cable


NT Sensors software

software imacimus

Single Ion: Ammonium electrode

The most classic look-like ion selective electrode, with innovative replaceable tip and probe holder for several tip sensors. Discover this electrode, one body, multiple sensor tips.

Ammonium ion-selective electrode probeREF: S018
Diameter: 12 mm

Conector type:
– BNC (standard)
– USB (imacimus meter)

Minimum sample volume: 5 ml
PDF information about Single Ion

ISE Ammonium

Where is ammonium measurement required so far?

Ammonium ion is mainly encountered as a waste product in municipal wastewater in the form of urea. As a consequence, water sources with an ammonium concentration of 1 mg/l are not suitable. The use the ammonium ion selective electrode  helps to know your water quality and avoid serious problems.

Some specific use of the ammonium electrode are; for example:

  • Studying the spread of harmful substances from diffuse sources.
  • Monitoring aquaculture crops to point out dirtiness due to excessive nutrient concentration.
  • Monitoring nutrient content in natural waters.
  • Measure ammonia introduced from fertilizers.
  • Can monitore the equilibrium and indicate aqueous ammonia levels when samples are acidified to convert NH3 to NH4+.