A pressure transducer for determining atmospheric pressure and evapotranspiration with a hydraulic weighing lysimeter

The construction and recording of pressure transducers for measuring atmospheric pressure and total pressure, i.e. a hydraulic weighing lysimeter, is described. The principle of operation consists of a variable concentric capacitor to control the frequency of oscillation of a free-running multivibra...

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Bibliographic Details
Published inAgricultural meteorology Vol. 26; no. 4; pp. 273 - 278
Main Authors Fritschen, Leo J., Simpson, James
Format Journal Article
LanguageEnglish
Published Elsevier B.V 1982
Subjects
meteorology and climatology
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Summary:The construction and recording of pressure transducers for measuring atmospheric pressure and total pressure, i.e. a hydraulic weighing lysimeter, is described. The principle of operation consists of a variable concentric capacitor to control the frequency of oscillation of a free-running multivibrator. The sensitivity of the transducers was 84 Pa Hz −1 and 8 mm H 2O Hz −1. Techniques which would increase the resolution of atmospheric pressure to 0.7 Pa and of a standpipe to 0.06 mm H 2O are discussed. The temperature coefficient of the transducers is about 0.5 Hz°C −1.
Bibliography:ObjectType-Article-2
SourceType-Scholarly Journals-1
ObjectType-Feature-1
content type line 23
ISSN:0002-1571
DOI:10.1016/0002-1571(82)90044-9