... for many differential pressure flow meters (e.g. standard orifice-plate, V cone, venturi tube, velocity-averaging tube, wedge, ... elbow), applicable for measuring multi fluids. Compared with standard orifice-plate flow meter, LZP intelligent differential pressure (Equilibrium) flow meter ... speedclean liquid, steam or airliquid, air, mud, a two-phase flow, high speed flow, low or high viscosity ...