Here are 4 common types of electrodes:
1. Metal electrodes – Made of inert metals like platinum, gold, or silver. These conduct electricity easily.
2. Glass electrodes – Made of special ion-sensitive glass. Used to measure pH in solutions.
3. Gas-sensing electrodes – Made of materials like metal oxides that change resistance when exposed to certain gases. Used to detect gases.
4. Ion-selective electrodes – Use a membrane permeable to only certain ions. Can measure the concentration of those ions in a solution.
