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A Miniature Gravity‐Fed Thermocouple Psychrometer 1
Author(s) -
Mitchell S. T.,
Kimball B. A.,
Ehrler W. L.
Publication year - 1973
Publication title -
agronomy journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.752
H-Index - 131
eISSN - 1435-0645
pISSN - 0002-1962
DOI - 10.2134/agronj1973.00021962006500020016x
Subject(s) - hygrometer , thermocouple , wet bulb temperature , materials science , volumetric flow rate , electromagnetic shielding , analytical chemistry (journal) , chemistry , humidity , composite material , mechanics , thermodynamics , physics , chromatography
A miniature gravity‐fed thermocouple psychrometer was constructed and tested over a wide range of humidities and flow rates. The unit gave accurate wet bulb depression in 6‐mm flow tubes through an acrylic plastic block with a minimum flow rate of only 0.06 m/sec at 35% RH, and of only 0.09 m/sec at 11% RH. The psychrometer also agreed exactly with a standard psychrcmeter (Assmann type) in open air without forced ventilation or radiation shielding.