1.Precisely control filling amount through control of piston stroke of the cylinder with a fixed volume. 2.Two options are available for controlling piston stroke: a) Cylinder type control b) servo motor type control 3.Filling is disabled for lacking of bottles and fallen bottles, and filling leaves no drop; high filling precision; 4.Easy and convenient operation; reliable performance and safety linkage. Applicable scope: it is suitable for filling of flowing liquid, laundry detergent, lotion and viscous solutions in industries like pharmaceutical, food, chemical industry, cosmetics, liquid soap industry, light industry and agriculture.