Dissolved oxygen (DO) meter
600 µl - 8 ml | Model 5300A YSI Life Science

The YSI 5300A Biological Oxygen Monitor is ideal for a variety of teaching and research applications in the laboratory. The 5300A measures oxygen consumption and evolution in a variety of samples including respiration, oxidative activity, and cellular metabolism studies.
The 5300A utilizes Clark-type polarographic oxygen probes immersed in magnetically-stirred sample chambers, and produces oxygen uptake or evolution curves in two to 15 minutes. This two-channel instrument offers simultaneous display, recorder outputs, and RS-232 serial output for monitoring the results of each evaluation of samples.