Which of the following can be used to measure excessive occupational exposure?

A dosimeter is an instrument specifically designed to measure and record the amount of ionizing radiation exposure that an individual has received over a specific period. It is commonly worn by workers in environments where they may be exposed to radiation, allowing for continuous monitoring of radiation levels. By providing accurate readings of accumulated doses, dosimeters help ensure that occupational exposure remains within safe limits and align with regulatory requirements for radiation safety.

In contrast, a sensor sleeve, protective barrier, and lead apron serve different purposes related to radiation safety. A sensor sleeve may monitor certain parameters but does not measure exposure in the way a dosimeter does. Protective barriers and lead aprons are used to shield individuals from radiation exposure rather than to measure it. They are essential components of a comprehensive radiation safety strategy, but they do not provide quantitative data on the level of exposure received.