Patent ID: 6244093
Filing Date: 2001-06-12
Classification: G01N

Abstract:
An apparatus for monitoring environmental air quality comprising:a) an air monitor for detecting components of air in an environment; andb) a calibration kit for calibrating the air monitor comprising:i) a gas cylinder containing a calibration gas for use in calibrating the air monitor by flowing the calibration gas over a sensor located within the air monitor;ii) a preset regulator valve connected to the gas cylinder for permitting a predetermined calibration gas flow condition out of the gas cylinder;iii) a flow matching valve connected to the preset regulator valve for permitting the calibration gas flow condition to be maintained within a relative range of flow condition deviation; and wherein the flow matching valve comprises: a first housing with an axial passageway for permitting gas flow therein; a second housing connected perpendicularly to the first housing and having an axial passageway for permitting gas flow therethrough; a ball located within the second housing for preventing environmental air from entering the second housing while permitting gas flow to the environment; the second housing having a ball seat for providing an air-tight seal when the ball is nudged against the ball seat; and a cover attached to the second housing for preventing the ball from escaping the second housing while allowing gas flow therethrough; andiv) a tube connecting the flow matching valve to the air monitor for transporting the calibration gas to the air monitor.