The FSX TrapTester Air Flow Test Bench can help identify defective filters, and is used to record before and after cleaning air flows on customer filters to determine success or failure on cleaning the filter. The system can be used to measure filter performance at each stage of cleaning process and to identify defective filters. The TrapTester is calibrated specifically for precision measuring of air flows on DPF. This system handles 9” diameter filters and larger. Optional adapter plate are also available for smaller diameter filters.