Patent ID: 6109116
Filing Date: 2000-08-29
Classification: F24F,G01F

Abstract:
Apparatus for use in simulating the location of a through-the-wall sensing means of the type which requires a hole be located in at least one of the sidewalls of a laboratory fume hood having sidewalls, a face opening and an adjustable sash door adapted to vary the size of the face opening when manipulated by a user, said apparatus being adapted for use in locating the optimum location for placing the hole to provide consistent air flow measurements throughout a range of sash door positions in the face opening, said apparatus comprising:an elongated hollow tube being adapted to communicate air therethrough, said tube being sufficiently rigid to maintain its configurational shape during use, said tube having a generally 90 degree elbow with an inlet opening in one end portion thereof and an outlet opening in an opposite end portion, said inlet opening thereby being in a position whereby it is generally in a plane parallel to the sidewall and adapted to receive air flow in a manner simulating a hole in the sidewall, said tube being sufficiently long to enable a user to locate the inlet opening over a broad range of positions along one of the sidewalls with the sash door being in varying positions to thereby enable an optimum location for placement of the hole in the sidewall;means for measuring air velocity; and,a flexible tubing interconnecting said outlet opening of said tube with said measuring means so that said measuring means measures the velocity of the air entering said inlet opening of said tube.