초록 ▼

A small moisture addition apparatus which regularly, through use of a counterflow, adds a controlled amount of moisture to a sample gas analyzed by an hygrometer to reduce the response time of the hygrometer and to provide automatic verification that the hygrometer is functioning. A method of using

A small moisture addition apparatus which regularly, through use of a counterflow, adds a controlled amount of moisture to a sample gas analyzed by an hygrometer to reduce the response time of the hygrometer and to provide automatic verification that the hygrometer is functioning. A method of using that apparatus is also disclosed. The apparatus and method of the present invention can be applied to gas components other than moisture and to the detectors of such components.

대표청구항 ▼

A gas mixture generator comprising: a gas stream; a source of a component to be added to said gas stream; a connection from said source to said gas stream permitting the addition of said component to said gas stream; a leg positioned in said connection between said source and said gas stream through

A gas mixture generator comprising: a gas stream; a source of a component to be added to said gas stream; a connection from said source to said gas stream permitting the addition of said component to said gas stream; a leg positioned in said connection between said source and said gas stream through which gas from said gas stream can be removed; a counterflow formed in part of said connection when said gas is removed from said connection, said counterflow regulating the amount of said component added to said gas stream; means for controlling the amount of said gas from said gas stream which is removed through said leg; an analyzer able to detect said component in said gas stream and give information on the amount of said component present in said gas stream after said addition; and means for providing a feedback signal from said analyzer to said controlling means to control the amount of said gas from said gas stream which is removed through said leg.