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Simple, Inexpensive Solid State Liquid Level Detection and Control 1
Author(s) -
Spomer L. Art
Publication year - 1981
Publication title -
agronomy journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.752
H-Index - 131
eISSN - 1435-0645
pISSN - 0002-1962
DOI - 10.2134/agronj1981.00021962007300010030x
Subject(s) - simple (philosophy) , solid state , capacitor , state (computer science) , control system , alarm , process engineering , computer science , false alarm , biological system , control engineering , computer hardware , electronic engineering , electrical engineering , engineering , algorithm , artificial intelligence , engineering physics , philosophy , epistemology , voltage , biology
Liquid level detection and control is commonly used in agronomic and soil science research. Various mechanical, electromechanical, and solid state systems have been devised for this purpose. Of these, the solid state systems are the most versatile and reliable but also the most expensive to purchase or complex to construct. The function and construction of a very simple, inexpensive, sensitive, and versatile solid state liquid level detection and control system is described here. The detection circuit consists of an integrated circuit plus two capacitors and a simple bielectrode probe. Indicator, alarm, and control functions are available with the inclusion of as few as one to three additional components.