Electrochemical oxygen sensor (O2)
TriOxmatic® series
WTW
ECDO stands for Electrochemical Dissolved Oxygen Sensor. 60 years ago, Clark's cell was introduced and WTW was among the first manufacturers to advance this principle for water and wastewater applications.
The electrochemical principle
With the electrochemical method the O2 diffuses through the membrane of the TriOxmatic® sensor. The oxygen is transformed in a chemical reaction by using an electrolyte; thereby a current can be measured. The electrical current correlates to the oxygen concentration. For delivering precise results, the sensor will require the following conditions:
* Flow
* Continuous exchange of electrolytes
* Clean membrane
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