One of the most difficult flow measurements for the automotive engineer is to measure the engine oil flow rate under operating conditions. Open channel flowmeters measure the height of the liquid as it passes over a flume or weir obstruction level switch sensor Malaysia placed in the channel. Even if this point is carefully determined at the time of calibration, it is not likely to remain unaltered, since velocity profiles change with flowrate, viscosity, temperature, and other factors.
Atrato ultrasonic flow measurement devices are suitable for coffee, beverage & drink dispensing, laboratory & scientific environments, the flow measurement of cooling systems, active flow alarm implementation, semiconductor plant and manufacture, pilot plant environments, fuel cell flow measurement, pharmaceutical applications, OEM applications, petrochemical flow measurement and aggressive chemical flow metering.
The flowing fluid impinges on the turbine blades, imparting a force to the blade surface and setting the rotor in motion. Because the cross-sectional area of the pipe is known, the product of that area and the flow velocity will provide a measure of volumetric flow.
The TSI mass flow meters are specified as two percent of flow rate reading. The ADMAG AXR is the world's first 2-wire magnetic flow meter which employs the unique "Dual Frequency Excitation Method," achieving 0.5% of rate of best-in-class accuracy and excellent stability for process measurement.
Doppler flowmeters are named for the Austrian physicist and mathematician Christian Johann Doppler (1803-1853), who in 1842 predicted that the frequencies of received sound waves depended on the motion of the source or observer relative to the propagating medium.
The Woltman meter (invented by Reinhard Woltman in the 19th century) comprises a rotor with helical blades inserted axially in the flow, much like a ducted fan; it can be considered a type of turbine flow meter. The voltage signal is then processed by a transmitter, which determines the flow of the liquid.
Methods for testing hydroelectric turbines are given in IEC standard 41. Such flow measurements are often commercially important when testing the efficiency of large turbines. More holes allow the instrument to measure the direction of the flow velocity in addition to its magnitude (after appropriate calibration).