Porter-Bronkhorst AixtronAugust 24, 2012|Mass Flow Controllers, Porter-Bronkhorst Home » Mass Flow Controllers » Porter-Bronkhorst » Porter-Bronkhorst Aixtron Coastal Instruments services many of Porter-Bronkhorst mass flow controller models. The Porter-Bronkhorst Aixtron is among the mass flow controller products that we service.