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This article in AJ

  1. Vol. 65 No. 2, p. 238-239
     
    Received: Apr 20, 1972
    Published: Mar, 1973


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doi:10.2134/agronj1973.00021962006500020016x

A Miniature Gravity-Fed Thermocouple Psychrometer1

  1. S. T. Mitchell,
  2. B. A. Kimball and
  3. W. L. Ehrler2

Abstract

Abstract

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.

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