Glass rotameter mainly used in various sectors of chemical, petroleum, light industry, medicine, fertilizer, chemical, food, dyes, environmental protection and scientific research, etc., used to measure single-phase non-pulsating flow (liquid or gas) fluid. Corrosion resistant glass rotameter corrosive liquids mainly used to detect the flow of gaseous media, such as strong acids (except hydrofluoric acid), alkalis, oxidizing agents, strong oxidizing acids, organic solvents and other corrosive gases or liquids have medium flow testing.