LZQ metal tube rotameter is used to continuously measure the flow of non-corrosive liquid for stainless steel 1Cr18Ni9Ti. It can display transient flow and output standard 0.02～0.1MPa signal. It can match with secondary instrument and pneumatic unit instruments. It is widely used in chemical, petroleum, pharmaceutical, light industry and other sectors. It is simple structure, high reliability, wide range and anti-explosion.