XFTY series turbine flow sensor (hereinafter referred to as sensors) based on the principle of moment equilibrium, is the speed of flow meter. Sensor has a simple structure, lightweight, high precision, good reproducibility, responsive, installation and maintenance and easy to use, widely used in petroleum, chemical, metallurgy, water, paper and other industries, is the ideal instrument for flow measurement and energy-saving. Fluid flowing through the sensor housing, the impeller blades and the flow of a certain angle, the momentum of the fluid leaves the rotational torque to overcome the friction torque and the fluid resistance blade rotation speed in the torque balance stable, under certain conditions. speed and flow rate is proportional to the leaves permeability, it is a signal detector (composed by the permanent magnet and coil) magnetic field, the rotating blades cutting magnetic field lines, periodically changing magnetic flux of the coil, so that the coil induced electrical pulse signal, this signal after the amplifier to enlarge the plastic, there is a certain level of continuous rectangular pulse, Far EasTone to show the instrument, showing the fluid flow rate or total. Within a certain range of flow, instantaneous flow rate of the pulse frequency f and the fluid flowing through the sensor Q is proportional to the flow equation: Q = 3600 x f / K 
 Where: f-pulse frequency [Hz] 1