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HomeProductsProduct categoriesAnalyzerTresCon® Analyzer > Analyzer for nitrite

TresCon® analyzer for nitrite

WTW Analyzer TresCon®  analyzer for nitrite

Monitoring of the nitrification process in wastewater treatment plants and controlling nitrite values in the drain - with automatic two-point calibration for high measuring precision

  • Reliable and accurate thanks to its 2-beam reference photometer
  • Continuous background compensation
  • Used in low contamination wastewater without sample preparation

The measuring principle of the NO2 module is based on the Azo dye method. Upon its reaction with nitrite, a reagent produces a pink coloration of the measuring solution. The intensity of the coloration is proportionate to the nitrite concentration in the sample and is measured with a 2-beam reference photometer. With an additional manual correction function, the system can be accurately matched to system-specific characteristics, so that even strongly dyed samples achieve a high measuring accuracy.

  • Control measurements in drinking water preparation
  • Monitoring of nitrite contamination of natural waters
  • Limit value monitoring in fish farming


Model Description Order no.
ON 510 Separate TresCon® analysis module for online nitrite measurement 820009
TCU/N511 TresCon® Uno single parameter system with analysis module ON 510 820103
TresCon® Nitrite, N511 Multi-parameter system TresCon with an analysis module ON 510 8A3-0030

Technical Data

Measuring range NO2-N: 0.005 - 1.200 mg/l
NO2-: 0.020 - 4.000 mg/l
0.40 - 90 µmol/l
0.40 - 90 µmol/l
Resolution (display) Range: 0,005 ... 1.200 mg/l :
0.40 ... 90.00 µmol/l :
0.001 mg/l
0.1 µmol/l


Model Description Order no.
BEH/ T 1,5 1.5 Liter wide mouth bottle 821017
BEH/ T 10 10 Liter canister 821019
BSet/ N511 Container set for analysis module nitrite 821057
C/TCM1 1.5 l cleaning solution 821156
EL/ TC Replacement lamp photometer block 821175
Wpack/ N511 Maintenance requirement consumables 821203


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