QTLD/F model partial filled pipe electromagnetic flow meter is a kind of measurement instrument that uses the velocity-area method to continuously measure the fluid flow in pipelines (such as semi-pipe flow sewage pipes and large flow pipes without overflow weirs).

Electromagnetic flowmeters are generally used in food industry flowmeters, which are mainly used to measure the volume flow of conductive liquids and slurries in closed pipelines, including corrosive liquids such as acids, alkalis, and salts.

Liquid turbine flow meter , vortex flow meters, ultrasonic flow meters, coriolis mass flowmeters, metal tube rotameters, etc. can all be used to measure pure water.

Flow meters and valves are among the most commonly used equipment. The flowmeter and valve are often installed in series on the same pipe, and the distance between the two can vary, but a question that designers often have to deal with is whether the flowmeter is on the front or back of the valve.