Measuring and testing – Specimen model or analog
Patent
1986-06-13
1987-12-01
Yasich, Daniel M.
Measuring and testing
Specimen model or analog
73335, 116227, 116321, G01N 1910, G01F 2302
Patent
active
047095857
ABSTRACT:
An atmometer for estimating a crop consumptive water evapotranspiration employs a green canvas colored material which is wrapped around a porcelain evaporating surface. The material simulates the albedo and diffusion resistance properties of the crop in order to provide an accurate estimation of evapotranspiration. A check valve at the bottom of the reservoir bottle helps prevent precipitation from adversely affecting the evapotranspiration estimate. Additionally, a sight glass is provided for indicating an amount of evaporated water.
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Livingston, Atmometers of Porous Porcelain and Paper, Their Use in Physiological Ecology, Ecology, vol. XCI, No. 3, Jul. 1935.
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