Hach sension6, Instruction Manual, Page: 65 / 86

64
SECTION 6,
continued
Interferences
Oxidizing gases such as chlorine, chlorine dioxide, sulphur
trioxide, and bromine can react at the cathode to produce positive
interferences. Reducing gases such as hydrogen, hydrogen
sulfide, sulfur dioxide, and boranes can react at the anode. After
exposure to reducing gases, the user may need to clean the anode
and replace the internal filling solution and membrane cap.
Summary of Method
The sens
ion
6 Dissolved Oxygen Meter responds to the dissolved
oxygen concentration activity by developing an electrical current.
At a constant temperature, the electric current varies linearly with
the oxygen concentration of the solution. An increase in
temperature will increase the oxygen diffusion through the
membrane exponentially. The meter utilizes automatic
temperature compensation to ensure accurate results.