1. Home
  2. General
  3. Why is the sulfur dioxide (SO2) level so high?
  1. Home
  2. General
  3. Why is the sulfur dioxide (SO2) level so high?

Why is the sulfur dioxide (SO2) level so high?

The most likely cause of a high reading, is the presence of sulfur dioxide(SO₂).

The air-Q’s existing Sulfur dioxide (SO2) measures according to an electrochemical measuring principle. Various effects, e.g. climatic shocks, can cause a shift of the zero line. This can be remedied by calibration.

See also: How do I perform a manual calibration?

Another cause for very high or deviating measured values can also be the cross-sensitivities that the sulfur dioxide sensor has. For example, it reacts positively to hydrogen sulfide, nitric oxide; negatively to alcohol and ozone(O₃). 

Thus, all framework conditions must be checked and the measured values must also be compared with the measured value of the nitrogen dioxide(NO₂) sensor and ozone(O₃) sensor in the air-Q to rule out possible cross-sensitivities as a cause.

Was this article helpful?

Related Articles