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Digital ISE sensor for ammonium

WTW sensors - digital ISE sensor (ammonium) AmmoLyt®Plus 700 IQ

Ammonium measurement directly in the medium without sample preparation and sample transfer. Measurement of centrate and other process waters up to 2,000 mg/l NH4-N

  • Calibration free, long-term stability
  • No chemicals
  • Short response times

The ISE sensor AmmoLyt ®Plus 700 IQ allows ammonium measurement directly in the process. Time-consuming steps such as sampling and preparation are eliminated. For stable measured values, the interference substance potassium is compensated simultaneously and can be displayed if needed. An energy-optimized operation by a suitable regulation of the blower aggregates is made possible by this ISE sensor. This will help effectively reduce operating costs of the system, which is amortized by the system in a very short time. 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!


Model Description Order no.
AmmoLyt® Plus 700 IQ Digital sensor for ion selective measurement of ammonium 107070
AmmoLyt® Plus SET AmmoLyt® Plus 700 IQ , VARiON® Ref and VARiON® Plus NH4 107071
AmmoLyt® Plus SET/Comp AmmoLyt® Plus 700 IQ , VARiON® Ref, VARiON® Plus NH4 and VARiON® Plus K 107072

Technical Data

Ammonium measurement
Integratable measuring chains Reference
Measuring electrode
VARiON® Plus Ref
Measuring ranges/resolution NH4-N

1 ... 2,000 mg/l /1 mg/l;
0.1 ... 100 mg/l / 0.1 mg/l
1 ... 2,580 mg/l /1 mg/l;
0.1 ... 129.0 mg/l / 0.1 mg/l
Compensation ranges K+ 1 ...1.000 mg/l / 1 mg/l
Temperature measurements and compensation Integrated NTC

0 °C … +40 °C
±0.5 K
0.1 K, t95 < 20 s


Model Description Order no.
VARiON® Ref Reference electrode 107042
VARiON®Plus NH4 Ammonium electrode 107044
VARiON®Plus K Potassium electrode 107046
VARiON®/ES-1 Combination standard 1 (low concentration), 1000 ml 107050
VARiON®/ES-2 Combination standard 2 (high concentration), 1000 ml 107052
VARiON® 700 IQ-SK Protective basket for ISE electrodes 107056
VARiON®/Epack Spare parts set: 1 special socket wrench, 1 blind plug, 3 replacement gaskets for electrodes and 1 storage container for the moist storage of the electrodes 107057
DIQ/CHV Dual IQ/Cleaning Head Valve for system 282/284 472007
MIQ/CHV PLUS Module IQ/Cleaning Head for system 2020 480018
Cleaning Air Box - 115 VAC Air pressure compressor, 115 VAC 480017
Cleaning Air Box - 230 VAC Air pressure compressor, 230 VAC 480019
CH Cleaning head 900107


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