• (n.) An instrument for ascertaining the amount of ozone in the atmosphere, or in any gaseous mixture.
O`zo·nom'e·ter noun [ Ozone + -meter .] An instrument for ascertaining the amount of ozone in the atmosphere, or in any gaseous mixture. Faraday. 
Type: Term Pronunciation: ō′zō-nom′ĕ-tĕr Definitions: 1. A modified form of ozonoscope, in which by a series of test papers the amount of ozone in the atmosphere may be estimated.
An ozonometer is an instrument used for ascertaining the amount of ozone in the atmosphere, or in any gaseous mixture.