Parameter / Hydrogen Peroxide 


Hydrogen peroxide as a pure substance is an explosive liquid. Commercially available are more stable colourless solutions of approx. 30% H2O2 in water. Light and catalysts such as manganese dioxide, platinum, or even blood or dust cause hydrogen peroxide to decompose and release oxygen gas, which is why it is sometimes called “active oxygen”.

disproportionation hydrogen peroxide


Hydrogen peroxide is a weak acid and reacts as an oxidizing agent towards most substances. However, its oxidizing strength is much less than that of the other common disinfectants, and the concentrations used for disinfection accordingly much higher. Its effect is due to the production of highly reactive oxygen, with the advantage that there is no disinfection byproducts and no disagreeable odour. Since hydrogen peroxide decomposes in contact with solid materials, leaving only oxygenated water, waste water from rinsing and disinfecting of pipes and tanks can easily be discarded on the ground without risk for health or environment. This and the easy use of the liquid make it a popular disinfectant despite the high costs and comparatively low efficiency. 



Hydrogen peroxide can be used as a bleaching agent in pulp industries. In food&beverage industries it is used to disinfect PET bottles in aseptic facilities. In waste water it can be used to oxidize specific ingredients. As a disinfectant for drinking water, hydrogen peroxide is not permitted in Germany. It may be used as an oxidizing agent with severe restriction of the residual concentration. On the other hand, it is a popular disinfectant for drinking water pipes and tanks. In medical applications hydrogen peroxide is widely used for disinfection due to its good compatibility and odourless and colourless application.


Dr. A. Kuntze measurement

diagram sensor

Hydrogen peroxide is measured potentiostatically using two high-purity platinum electrodes and an Ag/AgCl reference. A defined potential is applied to the measuring electrode. On the measuring electrode peroxide is oxidized, giving electrons to the electrode. The controller monitors and readjusts the potential at the measuring electrode. The required current is a direct measure for the peroxide concentration.




You would like to monitor the Hydrogen Peroxide concentration in your process?

We recommend our Krypton K: a complete measuring system with all necessary components, including a sampling point!

For a more individual set-up select an instrument – either K 100 H2O2 for panel installation or K 100 W H2O2 with wall-mounting housing -, our membrane-free sensor PtPt-600-OO-2-1-PG, a flow assembly GD 3VG with defined incident flow, a sensor cable 5 SCR-M12-AE-X, and – if desired – our patented sensor cleaning ASR (cable included). We will be delighted to help you! Give us a call: +49 (0) 2150-7066-0


Hydrogen peroxide

Hydrogen peroxide measurement, waste water plant Hochheim

The measurment and control of the hydrogen peroxide concentration in a gas scrubber in the waste water plant Hochheim is realized with the dem K 100 H2O2 and the double platinum sensor PtPt-600-OO-2-1-PG…

Read more about it in the application report

K 100 (W) H2O2

A sophisticated single-channel –instrument for precise measuring and control of hydrogen peroxide…

Read more about this product