The longer the electrode is exposed to high temperatures (above 100 degrees °C) the darker it becomes. Likewise, the higher the temperature, the darker the colour. This is normal. If the electrode can be calibrated, it’s OK to use it.
The longer the electrode is exposed to high temperatures (above 100 degrees °C) the darker it becomes. Likewise, the higher the temperature, the darker the colour. This is normal. If the electrode can be calibrated, it’s OK to use it.