Psychrometer

Details Psychrometer Psychrometer

G - Physics

01

N

324/29.6

G01N 25/62 (2006.01) G01N 25/64 (2006.01)

Patent

CA 1191550

ABSTRACT OF THE DISCLOSURE A psychrometer having transducers producing two electrical signals respectively representing dry bulb temperature and wet bulb temperature, and an electrical circuit operating to derive a signal representing relative humidity in accordance with the formula: RH = .alpha. + .beta.t + .gamma.t' .alpha. + .beta.'t + .gamma.'t' where RH is the relative humidity t is the dry bulb temperature t' is the web bulb temperature and .alpha., .beta., .gamma., .alpha.', .beta.', and .gamma.' are constants. The constants are chosen to give accurate results over the desired operating range of the psychrometer. Suitable values for many applications are: .alpha. = 10.5 .alpha.' = 9 .beta. = -1 .beta.' = 2.2 .gamma. = 2 .gamma.' = -1.2

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