An Environmental Sensor is a device designed to monitor and collect data about various environmental conditions. These sensors can measure factors such as temperature, humidity, air quality, and light levels. They are commonly used in applications like weather stations, smart homes, and industrial settings to ensure optimal conditions and safety. These sensors often connect to networks, allowing real-time data transmission for analysis and decision-making. By utilizing technologies like IoT (Internet of Things), environmental sensors help in tracking changes in the environment, contributing to research, urban planning, and disaster management efforts.