In the flow switch, the magnetic level gauge works according to the principle of constant buoyancy, the float in the measuring tube with the level of lift and move up and down, the permanent magnet inside the float through the coupling, drive red, white turn column rotated 180 degrees, the column turned from white to red when the level rises, from red to white when you fall, in order to achieve the level indicator. However, float type level gauge works according to the principle of variable buoyancy, float with the level in the tank wall of the lift moves up and down, the spring force on the pull-buoy and proportional to the level, caused by detecting torsion spring force size of the angle to detect high and low level. Many types of flow switch, there is a more common thermal diffusion flow switch, which is somewhat different from the general principle, generally based on the thermal diffusion controlled. Thermal diffusion technology is an excellent performance in harsh conditions, high reliability technology, the typical principle is that when two sensing elements are placed in the fluid, flow switches, one of which is heated and another for the induction process temperature. The temperature difference between the two sensing elements with the original properties of the fluid velocity and the fluid related. The temperature difference between the two sensing element of the thermal diffusion flow switch between no-flow state is reached at the maximum, but also with the increase in traffic, resulting in cooling the heated sensor element, gems_ flow switch, temperature will gradually decreases. This process, the fluid flow rate will directly affect the degree of thermal diffusion. Works editing when the line of water flow is greater than 0.75L / min flow rate, dwyer flow switches, core displacement under the action of water and promote the role of magnetic source generates magnetic sensor outputs "1" switching signal, which is input the device control system, the power amplification to achieve the purpose of expansion after the water flow control. When the pipe in the water flow is less than 0.75L / min flow rate, driven by a magnetic core source return in force under the action of the return spring, the sensor outputs "0" switch signal to stop operation of the system. Flow switch is mainly online or plug-in installation of monitoring water system size of the water flow in the water, gas, oil, media pipeline. In the water flow above or falls below a set point when trigger an alarm signal to the unit, the system can make the appropriate action after acquiring a signal indicative. Avoid or reduce host "dry." Water flow switch, flow switch, swim swim TU TU offered by Beijing Science and Technology Co., Ltd. Beijing Tour En Technology Co., Ltd. (www.bjyouen.com) (www.bjyouen.com) strong, credible, in Beijing's Haidian District, chemical instrumentation industry has accumulated a large number of loyal customers. The company better work attitude and constantly improving innovative ideas will lead tours into the brilliant grace and you work for a better future!