IQ Sensor Net System IQ Sensor Net AmmoLyt Plus Ammonium Sensor

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The WTW ISE sensor AmmoLyt®Plus 700 IQ is a rugged, ion selective electrode (ISE) probe for the IQ Sensor Net process monitoring system. The AmmoLyt provides continuous and reagentless monitoring of ammonium and potassium using the most precise and reliable electrodes on the market. The individually replaceable electrodes have a typical lifetime of 18 to 24 months and are warrantied for 1 year minimizing maintenance effort and ownership cost.  

Product Features
  • Digital Ammonium and Potassium probe for IQ Sensor Net system
  • Measurement and display of ammonium and potassium
  • Measuring range up to 2,000 mg NH4-N/L; 1,000 mg K/L
  • Individually user-replaceable measuring and reference electrodes
  • Calibration free, long-term stability
  • Integrated NTC temperature sensor for temperature compensation
  • No chemicals

The AmmoLyt is a good choice for nitrification monitoring and advanced process control of activated sludge aeration to achieve the lowest energy usage.

Starting now, you will be able to reliably determine centrate and other process water with high ammonium load up to 2.000 mg/l NH4-N with the AmmoLyt®Plus!

AmmoLyt Plus 700 IQ - IQ sensor for NH4 and K (ISE) - SKU: 107070

AmmoLyt Plus SET/Comp - IQ sensor incl. NH4, K, and reference electrodes - SKU: 107072




ISE sensor for ammonium
Measuring method
Appropriate Electrode
Reference electrode VARiON® Ref, Measuring electrode VARiON®Plus NO3, Compensation electrode VARiON®Plus Cl
Measuring range/Resolution
NH4-N: 1 ... 2,000 mg/l / 1 mg/l; 0.1 ... 100 mg/l / 0.1 mg/l NH4+: 1 ... 2,580 mg/l / 1 mg/l; 0.1 ... 129.0 mg/l / 0.1 mg/l
Compensation Range
K+: 0.1 ... 1,000 mg/l / 0.1 mg/l
Measuring Accuracy in laboratory standard solutions
± 5 % of measured value ± 0.2 mg/l in standard solutions
Calibration Procedures
Matrix adjustment against any reference value, 2-point-calibration possible with multiple standard solution
Working Life (typically)
Reference electrode: 18 months, measuring and compensation electrode: 18 months (in typical application - municipal sewage plants)
Temperature Measurement and Compensation
Integrated NTC thermistor, Range 32 °F … 104 °F (0 °C … +40 °C), Accuracy ±0.5 K, Resolution 0.1 K, t95 < 20 s
Pressure Resistance
Maximum 0.2 bar (incl. SACIQ sensor connection cable, with installed electrodes)
Ambient Conditions
Operating temperature: 32 °F … 104 °F (0 °C … +40 °C), storing temperature: 32 °F … 104 °F (0 °C … +40 °C)
Electrical connections
2-wire shield cable with quick fastener to sensor
Electromagnetic Compatibility
EN 61326, Class B, FCC Class A; Intended for indispensable operation
Sensor body: V4A stainless steel 1.4571 Protective cup: POM Temperature sensor: V4A stainless steel 1.4571 Protection rating: IP 68 (0.2 bar, with installed electrodes) Electrode connector: POM
Approx. 1.48 lb (670 g, without electrode, without sensor connection cable)
AmmoLyt®Plus 700 IQ: 2 years Electrodes: 1 year for defects of quality


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