The turbine flow sensor is based on the torque balance principle and belongs to the speed flowmeter. The sensor has the advantages of simple structure, energy saving, high precision, lightweight, good repeatability, sensitive response, easy installation, maintenance, and use. Widely used in chemical, petroleum, water supply, metallurgy, paper, and other industries. It is suitable for measuring stainless steel 1Cr18Ni9Ti, corundum AI203, 2Cr13, cemented carbide, and other non-fiber, non-corrosive, particles and other impurities of the liquid. If it is equipped with a display instrument with special functions, it can be quantitative control and over-alarm. The explosion-proof version of this product (ExdIICT6 Gb) is suitable for an explosion-hazard environment. The sensor is applicable for medium with a viscosity less than 5×10-6m²/S at operating temperature, and for liquids with a viscosity greater than 5×10-6m²/S, after carrying out solid-liquid calibration, it can be used.