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1. Strain Relief
2. Probe Cap
3. PEI Probe Body
4. Temperature Sensor
5. Threads for Membrane Cap
6. Ag/AgCl Anode and Reference
7. Glass Insulator
8. Platinum Cathode
9. O‑Ring
10. Disposable Membrane Cap
11. Oxygen Permeable PTFE Membrane
12. Shipping Tube
DISSOLVED OXYGEN PROBE DIAGRAM
During this process, the following message will be displayed on the
LCD, “DISSOLVED OXYGEN PROBE CONDITIONING”.
The conditioning message will be displayed for about 60 seconds while
the DO probe is conditioned. If the probe was conditioned and a new
conditioning is not necessary, press any key to enter measurement
mode.
OPERATIONAL GUIDE
The probe is polarized with a fixed voltage of approximately 800 mV between the cathode and
anode. Probe polarization is essential for stable measurements. With the probe properly polarized,
oxygen is continually consumed as it passes through gas permeable PTFE membrane.
If polarization is interrupted, the electrolyte solution continues to be enriched with oxygen until it
reaches an equilibrium with the surrounding solution. Whenever measurements are taken with a
non‑polarized probe, the measurement will be drifty and inaccurate. The measurement will jump
when the probe is moved.
Note: When not in use and during polarization, use the protective transparent cap.
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