Sierra-Omega-Kobold-Matheson 730August 24, 2012|Mass Flow Controllers, Sierra-Omega-Kobold-Matheson Home » Mass Flow Controllers » Sierra-Omega-Kobold-Matheson » Sierra-Omega-Kobold-Matheson 730 Coastal Instruments services many of Sierra-Omega-Kobold-Matheson mass flow controller models. The Sierra-Omega-Kobold-Matheson 730 included in the list of products we service.