Pulp & Paper

Chlorine dioxide – gas


  • Down to 1ppm (2.3 mg.Nm-3) chlorine dioxide in the gas phase
  • Real time continuous measurement
  • Optimize generator & gas scrubber performance
  • Emission monitoring to ensure environmental regulations are met


Chlorine dioxide (ClO2) is used primarily as a bleaching agent in the pulp and paper industry for elemental chlorine free (ECF) bleaching. Chlorine dioxide has a strong UV absorption and is accurately and continuously measured in all liquid and gas streams using a Kemtrak chlorine dioxide analyzer.

The Kemtrak chlorine dioxide analyzer is used to optimize the reaction efficiency of ClO2 generation, improve the control of vent-gas scrubbers to reduce emissions into the atmosphere and for monitoring the final concentration of chlorine dioxide product sent to the bleaching plant.

Chlorine dioxide is an aggressive chemical substance – all wetted parts of the Kemtrak DCP007 flow cell are manufactured from corrosion resistant materials such as titanium and sapphire.

Chlorine Dioxide analyzer

Chlorine Dioxide (gas) Application Note
DCP007 Product Brochure

Contact a Kemtrak sales representative for more information.

Kemtrak chlorine dioxide analyzers

Kemtrak chlorine analyzers in a pulp mill (north of Sweden)




A pulp mill with Kemtrak analyzers between the different processing steps.