The venturi tube is a low-pressure-drop metering device and with its angled inlet and outlet cones which help control the pressure recovery, making the venturi the most efficient of all the differential meters available.
Also a venturi tube as perfect solution for high and low pressure measurements if minimum straight upstream and downstream lengths are available.
The design consists of a convergent cone section, cylindrical bore, and a divergent cone section.
The typical uncertainty of uncalibrated Venturi Tube is 1,5% – 3,0%.