An open-loop fast response gas sampling valve with current control
W S Reid; R L Desjardins; W Fagan; A Ginsburg; W S Reid; Engng. & Statistical Res. Inst., Agriculture Canada, Ottawa, Ont., Canada; R L Desjardins; Engng. & Statistical Res. Inst., Agriculture Canada, Ottawa, Ont., Canada; W Fagan; Engng. & Statistical Res. Inst., Agriculture Canada, Ottawa, Ont., Canada; A Ginsburg; Engng. & Statistical Res. Inst., Agriculture Canada, Ottawa, Ont., Canada
Журнал:
Journal of Physics E: Scientific Instruments
Дата:
1984-04-01
Аннотация:
An open-loop control sampling valve which uses the displacement of a thin diaphragm, produced by an electromagnetic actuator, to control air flow across a narrow annular passage is described. Its large flow capacity of up to 400 ml s<sup>-1</sup> and fast response make it suitable for sampling air proportional to the vertical wind velocity, a requirement for measuring the flux density of atmospheric gases using the eddy accumulation technique.
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