The metal rotor flowmeter has the characteristics of simple structure, reliable operation, wide application range, accurate measurement and convenient installation. Install a magnetic filter at the entrance. Its material should be the same as the corresponding flowmeter. Metal tube rotameter has been widely used in petrochemical, steel, electric power, metallurgy, light industry, food, pharmaceutical, water treatment and other industries due to its excellent performance and reliability, as well as good performance-price ratio.