Introducing the products of Golden Rule, a leading company in mass flowmeters. View all products Thermal mass flowmeter FN-mass flowmeter MFC/MFM | Mass Flow Controller & Meter MFC & MFM 분리형 KC-2700 MFC & MFM 일체형 KC-2700 고온기체 분리형 MFM KC-7720M MFM200 / MFC202 MFM D 300B / HFC D 302B MFM D 301B / HFC D 303B MFM D 305B / HFC D 307B MFM D 306B / HFC D 308B