The S type Pitot tube is one of the most widely used meters for dust contained gas velocity measurements in the industrial field

but the large pressure ports it has have influence on its measurement performance.A new kind of S type Pitot tube

named quasi-S type Pitot tube

is studied in order to decrease the effect caused by pressure ports but maintain its merits.Based on the findings from numerical simulations for the flow field of quasi-S type Pitot tube

a suitable port angle is determined for the better configuration.Then air experiments are carried out in a DN100 pipe with the flow velocity ranged from 15

5

0 m/s.The results show that the calibration coefficients of the quasi-S type Pitot tube is quite stable and very close to 1

and its relative errors

are ±4 %

which can satisfy the fluid flow measurement in most industrial applications.