When measuring NO/NOX concentrations using the chemiluminescence method (CLD), ozone occurs.
Ozone is an irritant gas and can lead to nosebleeds and pulmonary oedema in addition to tears and breathing difficulties. It is very harmful to health and should therefore never be inhaled. For this reason, the use of an ozone destructor is recommended in order to protect above all health, but also the nose (ozone is very odorous).