These filters work in Fast Loop configuration and uses a Membrane which can separate Liquid from Vapor sample. They can protects Gas Chromatographs and On-Line Analyzers from Liquid and Particulate damages and is always better than a coalesc- ing filter. Presently two model are available Model A - Use this Model when the liquid contaminant are intermittent and in small quantities. The maximum flow rate is 1.5 LPM Model B - Use this Model when the liquid contaminant are in large quantities. The maximum flow rate is 5 LPM MODEL B