ISE NH4-N AND NO3-N

VARON® PlusAN/A comp SET

Digital ISE sensor for NH4 and NO3, connectable to the IQ SENSOR NET
Ion selective measurement of ammonium and nitrate free of reagents with automatic compensation of potassium/chloride with the VARiON® Plus 700 IQ:

  • Ammonium and nitrate measurement directly in the process
  • Simultaneous compensation of potassium, chloride
  • No sampling, reagent-free
  • Calibration free, long-term stability
    These especially stable electrodes ensure long operation times and a simple cleaning method. To measure, simply install the respective electrode into the IQ SENSOR NET, everything else will take place automatically. In the measured value display, the values that have already been compensated, are displayed, you can select potassium or chloride output. These values also stand for the signal output per 0/4-20 mA output or digital output (Profibus, Modbus RTU, Ethernet/IP, Modbus TCP) is directly available.

New: Measurement of media with high ammonium load

When thickening or dehydrating wastewater treatment sludge, the so-called centrate water is generated. This water has an especially high amonium content. The centrate water is not drained but rerouted into the wastewater circuit of the system or directly broken down into elementary nitrogen (deammonification). In both cases, the determination of the NH4 freight is very important for an optimal process run. High NH4 concentrations of up to 2000 mg/l can now be determined directly in the medium by means of the Varion®Plus 700 IQ, in centrate water as well as in process waters!

Ammonium Measurement Nitrate Measurement
Measuring method Electrochemical
Maximum Configuration Common reference electrode, two measuring electrodes, one compensation electrode
Integrable Electrodes:
Reference Electrode VARiON®Plus Ref
Measuring Electrode VARiON®Plus NH4 VARiON®Plus NO3
Compensation Electrode VARiON®Plus K VARiON®Plus Cl
Measuring range/ Resolution NH4-N: 1 … 2,000 mg/l / 1 mg/l; NO3-N: 1 … 1,000 mg/l / 1 mg/l;
0.1 … 100 mg/l / 0,1 mg/l 0.1 … 100 mg/l / 0,1 mg/l
NH4+: 1 … 2,580 mg/l / 1 mg/l; NO3-: 5 … 4500 mg/l / 1 mg/l;
0.1 … 129.0 mg/l / 0,1 mg/l 0.5 … 450.0 mg/l / 0,1 mg/l
Compensation Ranges K+: 0.1 … 1,000 mg/l / 0.1 mg/l 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
Certifications CE
Mechanical 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
Weight Approx. 1.48 lb (670 g, without electrode, without sensor connection cable)
Warranty VARiON®Plus 700 IQ: 2 years
Electrodes: 1 year for defects of quality

*More instruments are available, please liaise with us if any of your required instruments is not listed above.