A humidity meter, also known as a hygrometer, is a device used to measure the amount of moisture in the air. It provides readings in percentage, indicating how saturated the air is with water vapor. Humidity meters are commonly used in various settings, including homes, greenhouses, and laboratories, to monitor and control indoor climate conditions. There are different types of humidity meters, including analog and digital models. Some advanced versions can connect to smart home systems, allowing users to track humidity levels remotely. Maintaining proper humidity levels is essential for comfort, health, and the preservation of materials like wood and paper.