The paper describes an innovative, more accurate and reliable method for calibrating an S-type Pitot tubes (SPT) by means of Laser Doppler Anemometry technique (LDA). Due to its coarse structure (since it is used in chemically aggressive environments), it requires periodic calibrations, which are carried out by means of a more accurate standard L-type Pitot tube (LPT). The use of LDA as standard allows overcoming the drawbacks inherent in the usual calibration technique.
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