Rotating vane flowmeters have the rotor offset toward the bottom of the housing. Through this type of construction, larger volume areas are present at the top. As a result, large volumes of flow can be made to move across the top with little or no return through the bottom. These flowmeters are used in the petroleum industry to measure gasoline, crude oil, and low-viscosity fluids. Metering ranges are available from a few lpm or gpm to 25, 000 barrels per hour for crude oil metering. Accuracies of ±0.1 percent are typical, and values as high as ±0.05 percent are possible with larger instruments.
Rotating washing nozzles has compact design that fits through small openings. It controls the stream or spray pattern of fluid in a spraying, misting, atomizing, and dispensing system. It has a high impact scrubbing action. Its slow rotation speed provides better cleaning and wide coverage.
Rotation sensors are used for supplying electrical outputs proportional to shaft rotation. It varies in terms of electrical outputs. It measures rotating motion and angular displacement of less than one turn. It uses several different types of sensing technologies depending upon where it is applied. Potentiometers are used to identify variable resistance and measure the angle of rotation as the shaft turns. Permanent magnets mounted to the rotating sensor shaft supply a magnetic field. Variable inductance sensors include a component on the rotating sensor shaft that induces magnetic field effects on multiple stationary coils.