Porter-Bronkhorst DB-F1COAugust 24, 2012|Mass Flow Controllers, Porter-Bronkhorst Home » Mass Flow Controllers » Porter-Bronkhorst » Porter-Bronkhorst DB-F1CO Coastal Instruments services a wide range of Porter-Bronkhorst mass flow controller models. The Porter-Bronkhorst DB-F1CO is one of the products we service.