Monitors high pressure air after filtration and indicates the water content in mg/m3. The Puracon can be used to monitor filter cartridge condition and informs the user when the filter needs changing. Serves as quality assurance for product liability for air filling stations avoids filter cartridge life calculations according to hours run and temperature redundant and provides assurance for clean air in oxygen mixing applications (Nitrox/Trimix). The Puracon can be mounted anywhere in the pipeline after the filter and a non return valve (to prevent pressure surges). Because the Purcacon is mounted after the filter housing, no modifications are necessary to an existing filter and standard cartridges are utilised.