2B Technologies products

All commercially available ozone monitors based on UV absorbance exhibit a water vapor interference.  Although not widely recognized, most scientists who work with UV ozone instruments are aware that rapid changes in humidity, as may occur during a frontal passage, will cause a large zero shift that may last for several hours.  This interference is especially troublesome in balloon and aircraft measurements where the instrument may rapidly pass through alternating dry and humid air parcels.  It also is a problem when one calibrates an ozone instrument using extremely dry tank air.