pHionics ORP and conductivity electrodes are robust and will not be damaged by mechanical means of cleaning such as brushing. This may not apply to products made by other manufacturers.
1. Add a detergent such as hand soap to water and dip a soft-bristle brush in the solution.
- Fine wet sandpaper or fine steel wool may also be used.
2. Scrub the electrode vigorously until no signs of contaminant remain.
- For ORP electrodes – Focus on cleaning the platinum bands toward the tip of the electrode and avoid brushing so hard that the bulb breaks. They are durable but not indestructible. If using sandpaper, attempt to only abrade the platinum band.
- For conductivity electrodes – Focus on the four round cells on the electrode and use a brush to clean the inside of the electrode guard. Make sure the plastic along the flat of the electrode is clear of debris to prevent entrapment of air bubbles that would affect measurement.
- If the electrode still does not appear clean, see the chart below for additional steps.
3. Recalibrate the sensor and verify that the slope error is within the acceptable ±15% for conductivity and that drift rate is low for ORP.
Always ensure the metal housing is contacting solution for most accurate measurements.