We recommend N2 for the optical purge on all PUV3402's. The reason is to minimize the zero drift. If air is used as the optical purge the area at the source will convert the oxygen in the air to ozone, which is a UV absorber and thus increase the zero drift on the analysis
Gary is the Manager for the Multiwave Photometer, Reid Vapor Pressure Analyzer and Dynamic Reflux Sampler. He recied a BS in Chemistry from Fairmont State Unitversity. He joined ABB in 1989 as an Application Engineer for the Multiwave Phtometer and later moved into product management.
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