Open AccessAn electronic valve controller for current control during the recording of oxygen consumption in aquatic animals
Author(s) -
H.H. Du Preez,
E. Grobler,
J. M. Bell
Publication year - 1989
Publication title -
suid-afrikaanse tydskrif vir natuurwetenskap en tegnologie/die suid-afrikaanse tydskrif vir natuurwetenskap en tegnologie
Language(s) - English
Resource type - Journals
eISSN - 2222-4173
pISSN - 0254-3486
DOI - 10.4102/satnt.v8i2.873
Subject(s) - power consumption , oxygen , controller (irrigation) , respiration , control valves , power (physics) , current (fluid) , electrical engineering , environmental science , engineering , chemistry , control engineering , biology , anatomy , physics , organic chemistry , quantum mechanics , agronomy
A control system is described which allows the automatic recording of the oxygen consumption of five aquatic organisms and one control. The electronic valve controller operates six three-way valves which permit water from each of the six respiration chambers to flow successively past the oxygen sensor. A 38.4 kHz quartz cristal oscillator ensures a ten minute period and is not affected by disturbances on the power circuit