Abstract
SummaryAn electrolytic respirometer and its accompanying pressure compensator are described together with some examples of performance. A simple transistorized detector circuit is used to automatically switch electrolysis and timing circuits to replace O2 used by a respiring sample. The respirometer is capable of measuring oxygen uptake within the range of 2 ml to 500 ml per 24 h. Oxygen uptake is calculated from the duration and rate of electrolysis. The accuracy of the method depends upon the maintenance of a stable current during electrolysis. The pressure compensator utilizes motor‐operated syringes to eliminate variation in air volume within the respirometer chamber due to changes in atmospheric air pressure.
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