Which personal monitoring device gives a visual display of exposure?

The electronic personal dosimeter (EPD) is designed to provide real-time monitoring of radiation exposure and typically includes a visual display that allows the wearer to see their current dose levels at a glance. This capability is particularly useful for immediate assessment of exposure and ensuring that radiation limits are not exceeded, enhancing safety for those working in radiation-prone environments.

In contrast, film badges and thermoluminescent dosimeters (TLDs) do not provide immediate feedback. Film badges require development to read the exposure, which can delay the assessment of radiation levels. TLDs, while they can be read and are accurate, also require processing and cannot show exposure in real-time. The general term "dosimeter" encompasses various types of devices without specifying their functionalities, leading to ambiguity regarding any real-time data display feature. Thus, the EPD stands out as the only option that meets the criterion of providing a visual display of exposure.