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Solid State Circuitry to Activate Event Recorders Used with Drop‐Counters
Author(s) -
Unger Paul W.,
Roberson G. M.
Publication year - 1970
Publication title -
soil science society of america journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.836
H-Index - 168
eISSN - 1435-0661
pISSN - 0361-5995
DOI - 10.2136/sssaj1970.03615995003400020053x
Subject(s) - drop (telecommunication) , voltage drop , relay , electrode , electronic circuit , environmental science , electrical engineering , voltage , engineering , chemistry , physics , power (physics) , quantum mechanics
A drop‐counting apparatus is used to determine soil moisture flow rates. A drop of water (soil solution) extracted from soil falls between two electrodes of the drop counter and initiates a series of events in the circuitry that activates the relay coil of the event recorder. The chart is marked at the time the drop passes between the electrodes.