Which is NOT a personal monitoring device?

The correct answer identifies the Geiger-Muller detector as not being a personal monitoring device. Unlike personal monitoring devices, which are designed for individual use to track and measure radiation exposure, the Geiger-Muller detector is typically used for detecting and measuring ionizing radiation in various environments rather than for personal exposure. It is more commonly found in laboratory or field settings for general radiation surveys and monitoring rather than being worn by an individual for personal dose tracking.

Personal monitoring devices, such as film badges, pocket dosimeters, and thermoluminescent dosimeters, are specifically designed to provide an indication of the radiation dose received by the wearer over a specified period. They allow for the assessment of individual exposure to radiation, which is vital for workers in radiation-related fields. These devices are typically small, portable, and worn on the person’s body to continuously measure and record exposure levels.