Variable flow meters also called rotameters are the most commonly used flowmeters in industry and laboratories. It has the characteristics of simple structure, small volume, intuitive, small pressure loss, and convenient maintenance.,etc

Metal tube variable area flow meter is suitable for measuring small flow through pipe diameter D <8 inch (200mm), and it can also measure the flow of aggressive & corrosive liquid, It can be used to measure the flow of liquid, gas and steam.

Rotameter can be variable area flow indicator, or it can be variable area rotameter with transmitter to have 4-20ma output, the current analogy output can be used in industrial automation process control.

Over the years, it has been widely used in petrochemical, iron and steel, electric power, metallurgy, light industry, food, pharmaceutical, water treatment and other industries for its excellent performance and reliability, and better cost performance.