How to use
1. Connect the electrode to the BNC connector of your pH meter.
2. Before measuring, twist off the storage bottle cap (see graph on the right), pull out the
electrode and rinse it off with distilled or deionized water.
3. Unplug the blue rubber plug to maintain a smooth electrolyte flow.
4. Perform at least a two-point calibration before measuring after connecting the new
electrode to your pH meter.
5. Measurement suggestions for HF-containing solutions:
5.1. Use a PTFE container while testing solutions containing hydrofluoric acid.
5.2. The electrode can measure HF solution less than 0.1mol/L (pH
≈
2.1) within 3 minutes each time.
5.3. When measuring HF solution around 0.5mol/L (pH
≈
1.8), after a long test, if the membrane is
obviously dissolved, the service life will be shortened. Our recommendation is to avoid such tests or
test faster, less than 2 minutes each time.
5.4. The electrode is not suitable to measure HF solution more than 0.5mol/L (pH
＜
1.8), which will cause
the electrode to perform at a poorer level or even be damaged.
5.5. After a while of usage, potential drift and slow response may occur to the electrode. Please re-
calibrate after soaking it in 3M KCL for more than half an hour. Stirring is recommended while
measuring to speed up stable measurement.
6. After using, put the electrode back into the storage bottle, twist on the bottle cap, and plug in the refilling
hole.
Maintenance
1. When not in use, the electrode should be soaked in the storage bottle containing 3M KCL soaking solution
(SKU: AI1107) to keep the glass membrane and junction in a healthy condition. Clean the bottle and
replace the soaking solution if it gets contaminated. The electrode should never be stored in pure water
such as deionized or distilled water.
2. The reference solution will run low as you use the electrode. Whenever the solution level falls to 1/2 height
of the electrode, add 3M KCL solution (SKU: AI1107) to the refilling hole (unplug the blue rubber plug)
using a syringe or pipette.
3. The electrode is only as accurate as it is clean. Always thoroughly rinse off the probe before and after each
measurement with pure water in a container or with a wash bottle.
4. For tough contaminants, soak the electrode in Apera cleaning solution (AI1166) for 30 minutes. Then use
