The Pitot tube measures the flow velocity of a fluid by comparing the total pressure with the static pressure. The difference between these two pressures, measured by a differentialpressure transmitter , is used to determine the velocity usingBernoulli's equation. This depressurized flowmeter measures the flow of liquid, gas, biogas or steam.
Easy, cost-effective installation of your speed measurements
With their low pressure drop, Pitot tubes are ideal for measuring gas and biogas flow, liquid flow and vapor flow.
Fuji Electric France, French manufacturer of Pitot tubes, offers two technologies:
Ideal for simple speed measurement applications with pipe diameters from 50 to 3000 mm
Annubar ® equivalent, the perfect speed meter for your advanced applications for pipe diameters from 50 to 1500 mm
Henri Pitot invented the Pitot tube, an essential flow-measuring instrument in aeronautics, hydraulics, meteorology, Formula 1 cars, most aircraft and, of course, industry. The Pitot tube concept was later taken up and corrected by French engineer Henry Darcy.
Pitot tube flow measurement is based on a velocity field exploration method ("measurement of velocity at a number of points in the flow cross-section to determine the average velocity, taking into account the area covered by each measurement point", according to AFNOR standard X10 112).
Flow measurement is performed by measuring maximum velocity. The probe is positioned in the center of the pipe. The shape of the velocity profile depends on the Reynolds number.
Measurement accuracy is equal to ±2% at max. velocity x0.84 (this coefficient can also be calculated using the Vennard and Blasius formulas) if the flow is turbulent.
The Pitot tube provides deprimogenic flow measurement by generating a differential pressure proportional to the dynamic pressure of the fluid when placed in the fluid flowing through the pipe. The Pitot tube is oriented at right angles to the direction of air flow, to measure static and total pressure.
The differential pressure generated is a function of axial velocity, fluid density and probe geometry (probe coefficient K0).
This differential pressure is measured by the differentialpressure transmitter connected to the high pressure (HP) and low pressure (BP) connections of the pitot tube.
By adding an absolutepressure transmitter and a PT100 temperature sensor with a corrected flow calculator, the flowmeter displays a mass flow rate and an analog output signal of the corrected volumetric flow rate.
GAS AND BIOGAS FLOW MEASUREMENT
STEAM FLOW MEASUREMENT
LIQUID FLOW MEASUREMENT
