Methods for measuring Ozone

The principal method used for measuring ozone is based on chemiluminescence.When ozone and ethylen react chemically,products are formed which are in exited electronic state.These products fluoresence,relasing light.The principal components are a cocstant source of ethylen,an inlet sample line for ambient air,a reaction chamber, a photomultuplier tube , and signal processesing circuitry.The rate at which light is recieved by the photomultipler tube is dependent on the ozone conentration and the ethylene.If the concentration of ethylene is made much higher than the ozone concentration to be measured, the light emitted is proportional only to concentration of ozone.