AF-XPP

Details

The Cross Pitot Primary (AF-XPP) represents a significant advance in air flow measurement. It uses four proven techniques to maximize reliability and accuracy:

AAM Products and Systems are manufactured and installed under one or more of the following US Patents and/or others that may apply. 5481919; 5764579; 6272399; 5402687; 5415583

• The pitot is internally manifolded into a measurement system that averages all four flow quadrants. A sensor measuring in all four quadrants is more likely to measure correctly in a duct which has a poor profile than one that only measures the flow in one plane.
• By using the Parallel Plate Pitot (AF-PPP) as the sensing element, the pitot’s maximum velocity range and accuracy are enhanced, particularly in the low range. The AF-PPP will operate in a poor profile air stream similar to a pitot with "honeycomb" or straightening vanes, but without the plugging problems usually associated with them.
• By installing the pitot in a thick-walled duct section, a beta ratio (the ratio of the measurement section to the entrance section) of less than one can be obtained. This technique makes the measurement section less sensitive to upstream conditions and, due to its structural stiffness, the internal area less likely to be affected by installation.
• The pitot’s uniquely ported total-pressure sensing holes allow the pitot to perform a velocity vs. typical pressure average. This results in a pitot that is more accurate under poor duct profile conditions and reduces the requirements for a straight duct run.

Additional Information

AF-XPP Data Sheet (Low Res) (High Res)