Dissolved oxygen sensor electrode

Dissolved oxygen sensor electrode：Oxygen electrodes can be used to measure the dissolved oxygen content in the aqueous solution of the tested sample in the field or laboratory. Required instruments and solutions:

●Extreme universal dissolved oxygen tester

●Pure nitrogen or anhydrous sodium sulfite (NaSO3)

●Filling solution (electrode comes with)

Dissolved oxygen sensor electrodePreparation before use:

1. Unscrew the oxygen membrane cap (oxygen membrane) accessory from the electrode column;

2. Rinse the internal cathode/anode parts with distilled water, and then dry them with a clean cloth;

3. Add the filling solution provided by the electrode to the oxygen membrane cap accessory, and then rotate and assemble the oxygen membrane cap filled with the filling solution onto the electrode columnOn the body. During assembly, some solution may flow out from a certain thread, which is a normal phenomenon and not a problem. Try to tighten the membrane cap as much as possible to ensure a tight connection between the membrane cap and the column, but do not apply too much force.
4. Observe the dissolved oxygen membrane and ensure that the cathode part inside the electrode is connected to the dissolved oxygen membrane. Attention: The dissolved oxygen membrane must be tightly stretched without any wrinkles or damage;
5. Rinse the assembled electrode with distilled water and then dry it with a clean cloth. This way it can be used.
Calibration and use of oxygen electrodes:
Connect the electrode to the oxygen measuring instrument (secondary meter), turn on the power switch of the instrument to polarize the oxygen electrode. The polarization time takes about 20 minutes.Then place the oxygen electrode tip into a beaker filled with clean water.After the reading stabilizes, follow the instructions provided by the oxygen meter (secondary meter) to operate the instrumentmake, do, create, compose, write, etc.“Calibration of 'a little air slope'This step needs to be repeated several times depending on the environment in which the test sample is located. The calibration structure should comply with the specifications in the instrument manual.After accurate calibration, the oxygen electrode can be put into measurement.
Storage of oxygen electrode:
During the rest period of measuring aqueous solution, please immerse the electrode tip into distilled water and keep the electrode connected to the instrument. The instrument should be in the open state so that the electrode can maintain polarization.*To store the electrode, it is necessary to first remove the electrode from the instrument, unscrew the electrode membrane cap, and then rinse the anode, cathode, and membrane cap of the electrode with distilled water. Then, dry them with a clean cloth and shake the membrane cap to ensure that there is no water residue on them. Then loosen the membrane cap and screw it onto the electrode, not too tightly. Place the electrode in the packaging box and place it away from light.
Dissolved oxygen electrodeMaintenance of:
The anode (silver tube) and cathode (platinum needle, also known as platinum needle) components in the electrode need to be regularly wiped with a polishing cloth to keep them in normal condition. When wiping, first unscrew the electrode cap to expose the anode and cathode parts, and then carefully wipe with the polishing cloth that comes with the electrode. Pay attention to applying appropriate force, especially when wiping, the pressure should not be too high. As long as these components are wiped clean and have a bright color on the surface, it is sufficient. Then rinse these components with distilled water first, followed by alcohol. Wipe dry and reassemble onto the electrode. Fresh filling solution should be added periodically within the oxygen membrane.