LB series scratch flowmeter is a volume-type flow measure instrument. It is used to measure flow of liquid in the sealing channels. The flowmeter can display instantaneous flow on site. It has remote transmission interface which can connect with photoelectric pulse converter and flow totalizer to do remote measurement, display and control. The flowmeter is high accuracy, good repeatability and wide rang. It is suitable to the high viscosity fluid, clean, non-corrosive liquid such as raw oil and oil products etc.