Meissner filters for critical applications are constructed with absolute-rated filtration media. All components are thermally bonded without adhesives or hot-melts. These filter cartridges deliver high flow rates with low pressure drops. They withstand repeated sterilizations and sanitizations, while providing extremely low extractables and high dirt-holding capacity. Our graded-density polypropylene microfiber filters are distinguished by their absolute particulate ratings, which are maintained even under the most severe process conditions. Fully automated production gives Meissner filter cartridges the most uniform, consistent construction and performance available anywhere.