Patent ID: 6895178

Claim:
A low-temperature vapor delivery system, comprising: a vaporizer chamber adapted to contain at least a minimum threshold volume of liquid water; a first control valve adapted to regulate the flow of liquid water into the vaporizer chamber; a liquid level sensor adapted to sense the level of liquid water in the vaporizer chamber; a heater adapted to affect the temperature of the liquid water within the vaporizer chamber; a temperature sensor adapted to sense the temperature of the liquid water in the vaporizer chamber; and a control system adapted to facilitate communication between the first control valve and the liquid level sensor, the heater and the temperature sensor for maintaining the liquid water at at least the minimum threshold volume at at least a minimum threshold temperature, such that upon lowering the pressure in the vaporizer chamber below about 1.013×10 5 Pascals (760 Torr), water vapor is produced within the vaporizer chamber without producing solid water.