Patent ID: 8395776

Claim:
A method of improving the measurement of the concentration of ozone in a continuously flowing sample of gas, the method comprising the steps of: providing a detection chamber having a light source on one side and a light sensing detector on the opposing side functioning to detect the amount of ozone in the gas sample; providing a gas phase ozone scrubber in the flow path of the gas sample before the ozone detection chamber; the gas phase ozone scrubber supplying a gas phase substance which reacts with ozone, said gas phase substance reacting with the ozone to substantially reduce the concentration of ozone in a selected portion of the sample; providing a means to produce a sample of gas in which the ozone has been substantially reduced in the ozone scrubber and an unaltered sample of gas; measuring the light intensity at the detector when the sample gas in which the ozone has been destroyed in the detection chamber; measuring the light intensity at the detector when the unaltered sample of gas is in the detection chamber; and using a Beer-Lambert law to calculate the ozone concentration within the detection cell.