Environmental sensors are devices designed to monitor and collect data about various environmental conditions. They can measure factors such as temperature, humidity, air quality, and soil moisture. These sensors help scientists and researchers understand changes in the environment and can be used in applications like agriculture, weather forecasting, and pollution control. These sensors often work in real-time, providing immediate feedback on environmental conditions. They can be found in many forms, including handheld devices, stationary units, and even integrated into smart cities or IoT (Internet of Things) systems. By gathering accurate data, environmental sensors play a crucial role in promoting sustainability and protecting natural resources.