Soil Sensors Whisper Wisdom for Sustainable Growth

Jingxun10 Jan, 2024Other

The NPK sensor works on the principle of electrochemical oxidation. It contains three electrodes: a reference electrode, a working electrode, and a counter electrode. The working electrode is typically made of copper, silver, or carbon, and is coated with a layer of indicator ink that changes color upon contact with the soil solution. The counter electrode provides a pathway for current flow and is typically made of copper or silver. The reference electrode serves as a reference point for the potential of the working electrode and is typically made of silver/silver chloride.