NOVELTY - Gas stream (GS) (16) is humidified by introducing pre-selected amount of water (24) and GS to be humidified into gas-liquid contactor (30) at a rate sufficient to cause vaporization of water by the GS. Subsequently, GS having precise amount of humidity is withdrawn from the contactor without requiring a device to measure moisture in humidified GS.    USE - Gas with precise moisture content is used in heat treatment processes such as annealing, brazing, sintering of ferrous and non-ferrous metals and alloys, reflow soldering of electronic components, glass-to-metal sealing, chemical process, chemical vapor deposition of metal oxides, laser processing, food processing industries to enhance chemical reactions, welding and spraying metallic and ceramic materials by thermal and plasma techniques. The humidified gas is also used for fuel cells, enhancing combustion and enhancing shelf life of perishable food items such as fruits and vegetables and packaging food stuffs.    ADVANTAGE - The gas stream is humidified with precise, consistent and reliable amount of moisture without relying on humidity or moisture measurement device. The micro processor present in the humidification installation provides desired input to high performance metering device to humidify the gas stream with desired dew point or moisture content. As flow rates of both gas and water, introduced into the gas-liquid contactor are precisely known, there is no need to monitor the dew point or moisture content of the humidified gas stream. Thereby, the use of a dew point analyzer or moisture analyzer that has proven to be inaccurate is eliminated.    DETAILED DESCRIPTION - Humidification of gas stream (GS) involves introducing pre-selected amount of water into gas liquid contactor adapted to cause vaporization of water by gas stream, introducing GS to be humidified into the water entering into contactor at a rate sufficient to cause vaporization of water by the GS and withdrawing GS having precise amount of humidity from the contactor without requiring a device to measure moisture in humidified GS.    DESCRIPTION OF DRAWING(S) - The figure shows the schematic diagram of a gas-liquid contactor.    Gas stream (16)    Water stream (24)    Gas-liquid contactor (30)