Profile: Bronkhorst USA Inc. offers thermal mass flow meters and controllers. Our product line includes gas & liquid mass flow measurement & control, pressure measurement and control, vapor production & primary calibration systems. Our El-Flow® series mass flow meters/controllers are thermal mass flow meters of modular construction with a pc-board housing and control valves can either be integrally or separately mounted to measure and control gas flows. We are accredited with ISO 9001:2000 certification.