IQ Sensor Net System IQ Sensor Net NitraLyt® Plus Nitrate Sensor

Overview Specifications Documentation & Tools


The WTW NitraLyt® sensor is a rugged, online probe for measuring temperature, nitrate and chloride concentrations with Ion Selective Electrodes (ISEs) for wastewater process monitoring. 

Product Features
  • Measurement and display of nitrate and chloride 
  • Dynamic compensation of nitrate measurement for chloride
  • Measuring range up to 1,000 mg NO3-N/L; 1,000 mg Cl/L
  • Individually, user-replaceable measuring and reference electrodes 
  • NitraLyt® reference system is very stable over long periods of time

The NitraLyt® probe is used within the IQ Sensor Net system and can be networked with other probes and parameters for a complete process monitoring and control system. It measures nitrate with the option to also measure chloride for compensating the nitrate measurement and reporting.

The NitraLyt® is the ideal probe for quantitative measurement of nitrate in a wastewater treatment plant. The efficient control of nitrate in wastewater relies on the ability to take the measurements directly in the process. This direct ISE measuring technology is possible with the NitraLyt® sensor, enabling optimization of a plant in respect to process efficiency and energy consumption.

2 versions:

  • NitraLyt Plus 700 IQ - IQ-Sensor für NO3 and Cl (ISE) (SKU: 107080)
  • NitraLyt Plus SET / Comp - IQ Sensor incl. NO3, Cl and reference electrodes (SKU: 107082)


IQ Sensor Net NitraLyt Plus Nitrate Sensor
Measuring method
Appropriate Electrode
Reference electrode VARiON® Ref, Measuring electrode VARiON®Plus NO3, Compensation electrode VARiON®Plus Cl
Measuring range/Resolution
NO3-N: 1 ... 1000 mg/l / 1 mg/l; 0.1 ... 100.0 mg/l / 0.1 mg/l NO3-: 5 ... 4500 mg/l / 5 mg/l; 0.5 ... 450.0 mg/l / 0.5 mg/l
Compensation Range
Cl-: 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)
NitraLyt®Plus 700 IQ: 2 years Electrodes: 1 year for defects of quality
Documentation & Tools

Documentation & Tools