Original Research

An electronic valve controller for current control during the recording of oxygen consumption in aquatic animals

H. H. du Preez, E. Grobler, J. M. Bell
Suid-Afrikaanse Tydskrif vir Natuurwetenskap en Tegnologie | Vol 8, No 2 | a873 | DOI: https://doi.org/10.4102/satnt.v8i2.873 | © 1989 H. H. du Preez, E. Grobler, J. M. Bell | This work is licensed under CC Attribution 4.0
Submitted: 14 March 1989 | Published: 14 March 1989

About the author(s)

H. H. du Preez,, South Africa
E. Grobler,, South Africa
J. M. Bell,, South Africa

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Abstract

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.

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