Patent ID: 8790464

Claim:
A pulse gas delivery system configured to deliver a range of precise and repeatable doses of a gas, comprising: a chamber of known volume and constructed and arranged to maintain the gas within the chamber at a uniform temperature and stabilized pressure within a range of pressures respectively before and after each dose of gas is delivered from the chamber; a valve constructed and arranged to open and close during a controlled time interval so as to deliver a pulse of gas of a requested dose during the time interval; a lookup table including data representing various time intervals, each time interval being a function of a corresponding dose of the gas to be delivered from the chamber and the initial stabilized pressure within the chamber; and a controller configured to access the lookup table, wherein the controller is operative to control the time interval of the valve solely as a function of the desired dose level of gas, and the initial stabilized pressure of the gas in the chamber before the delivery of each pulse.