Introducing the products of Golden Rule, a leading mass flow meter company. View all products Thermal mass flowmeter FN-mass flowmeter View all products Mass Flow Meter Thermal Mass Flow Meter KC-2610GI Insertion&Ex type KC-2610GF Inline&Ex type Extype KC-2610BI/Ex Bio Gas&Insertion Extype KC-2610BF/Ex Bio Gas&Inline KC-2610AI Velocity Meter FN-Mass Flowmeter Flow Conditioner