Patent Number: 7254493
Docket Number: 3705
Serial Number: 11304314
Date Patented: 08/07/2007

Summary: The invention consists of a pressure transducer based air velocity sensor that has been optimized for use in metal ducts. The fluid flow velocity is determined by measuring the propagation delay of a direct path pressure wave signal transmitted through the fluid as a function of a frequency difference rather than as a phase delay measurement. This system electronically removes multi-path signals from the measured signal, thereby obviating the requirement for installation calibration. Patent Status: Patent issued on August 7, 2007. Link at USPTO filed under patent title “Pressure transducer based fluid velocity sensor.” Inventors: Mathew G Pelletier Cotton Production and Processing Research ROUTE 3, BOX 215 LUBBOCK, TX, 79403 Phone: (806) 746-5353 Fax: (806) 744-4402 mathew.pelletier@ars.usda.gov