Patent ID: 6302779
Filing Date: 2001-10-16
Classification: B08B

Abstract:
A fume hood comprising:a) a chamber having in inlet and an outlet;b) a vacuum source for drawing air through said inlet and said chamber, and out of said outlet;c) an airflow regulator for creating a predetermined air velocity through said air inlet; andd) a pitot with front and rear edges in communication with said regulator to measure air velocity at said inlet, said pitot including an interior air pressure sensor and an exterior air pressure sensor, said interior air pressure sensor, said pitot including a substantially horizontal rear section with a rear end extending into said chamber and a downwardly curved front section with a front end extending out of said chamber, said exterior air pressure sensor being positioned at the front end of said pitot and said internal air pressure sensor being positioned at the rear end of said pitot including rear openings aligned substantially along the horizontal radius of said interior sensor.