BOC-Edwards-Datametrics 831August 24, 2012|BOC-Edwards-Datametrics, Mass Flow Controllers Home » Mass Flow Controllers » BOC-Edwards-Datametrics » BOC-Edwards-Datametrics 831 Coastal Instruments services many of BOC-Edwards-Datametrics mass flow controller models. The BOC-Edwards-Datametrics 831 is one of the models we service.