McMenon averaging pitot tubes

Wednesday, 01 June, 2022 | Supplied by: AMS Instrumentation & Calibration Pty Ltd


The McMenon averaging Pitot tube is a multiport self-averaging flow meter with a design based on the classical pitot tube concept of fluid flow measurement. The product produces an averaged differential pressure (DP) signal proportional to the square of the flow rate. The DP output is normally piped to a differential pressure transmitter in order to generate an electrical signal proportional to the flow rate.

The outer impact tube has a number of pressure sensing holes facing upstream which are positioned at equal annular points in accordance with a log-linear distribution. This pressure is represented at the head as the high pressure component of the DP output. The low pressure component is generated from a single sensing hole located on the downstream side of the outer impact tube, measuring static pressure. The product’s profiled flats are positioned around the downstream hole and define the separation point at which the flow lines separate as the fluid passes around the outer impact tube. This creates a stable pressure area at the downstream pressure sensing hole thereby maintaining a more constant flow coefficient at high velocities enabling a wide range of flow measurement (turndown).

Online: www.ams-ic.com.au
Phone: 03 9017 8225
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