Apparatus and method for generating calibration gas

Details Apparatus and method for generating calibration gas Apparatus and method for generating calibration gas

2006-02-14

2006-02-14

Jacyna, J. Casimer (Department: 3751)

Dispensing

Gas or vapor dispensing

C222S005000, C222S001000, C222S145600, C073S001040

Reexamination Certificate

active

06997347

ABSTRACT:
An apparatus and method for generating a low concentration of gas within a carrier gas flow employing one or more miniature one-piece cylinders filled under pressure with a pure gas, or a concentrated gas balanced with an inert gas or gas mixture. Released from the cylinder through a pierced or other controlled opening, the flow of the gas is regulated by a pressure regulator and a micro orifice to be blended into a steady stream of diluent gas, typically ambient air, to form a desired gas concentration. No gas is generated if the pressure of the gas in the cylinder, which is monitored constantly by a pressure transducer, is below a predetermined level. The apparatus can be built into a portable device, or an automated docking station (or calibration station) for testing and calibrating gas detection and monitoring instruments, or into a fixed gas detection system for performing such functions.

REFERENCES:
patent: 4531398 (1985-07-01), Di Benedetto et al.
patent: 5214952 (1993-06-01), Leggett et al.
patent: 6234001 (2001-05-01), Sorensen et al.
patent: 2004/0216508 (2004-11-01), Hirsch et al.

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