Electronics Puzzler: Ozone

By Forrest M. Mims III

How to Measure Ozone in the City

Engineer Ozzie Meterson read that an amateur scientist found that the ozone indicated by a government monitor was 20 percent too high. Ozzie searched online for various ways to measure ozone. When he was about to select an electrochemical sensor, his boss challenged him to come up with something new.

Ozzie was inspired by the challenge and went back online. There he learned how the most accurate ozone instruments use ultraviolet light, which is strongly absorbed by ozone. He suggested this method to his boss, who reminded him that the challenge was to come up with a new method.

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