Time‐ and Level‐Controlled Filling System for Class A Evaporation Pans
Publication: Journal of Hydrologic Engineering
Volume 2, Issue 1
Abstract
Recently developed integrated circuit technology and new reliable pressure transducers have made it possible to develop a battery-operated system to automatically fill class A evaporation pans from stored water. The system records and stores the average of 12 pan level records during a 1 min time period at the end of each 15 min period for later transmission to a central data storage facility. The measurement sensitivity of the system is 0.02 cm of evaporation over a range of 3.5 cm. A field calibration of the system showed that there was a very good (R2= 0.999) linear relationship between standard hook gage and pressure transducer water level measurements. This system is being used in remote locations because the circuitry draws very little quiescent current. A small solar panel keeps the system's 12 V battery fully charged.
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References
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Information & Authors
Information
Published In
Journal of Hydrologic Engineering
Volume 2 • Issue 1 • January 1997
Pages: 37 - 38
Copyright
Copyright © 1997 American Society of Civil Engineers.
History
Published online: Jan 1, 1997
Published in print: Jan 1997
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