Electronic personal dosimeters (EPDs) are devices used to measure an individual's exposure to ionizing radiation. They provide real-time readings of radiation levels, allowing users to monitor their exposure throughout the day. EPDs are commonly used in fields such as healthcare, nuclear power, and research, where radiation is present. These devices typically use semiconductor technology to detect radiation and display results on a digital screen. EPDs can store data for later analysis and often include alarms to alert users when exposure exceeds safe limits. This helps ensure the safety of workers in environments where radiation is a concern, such as nuclear facilities and radiology departments.