Which type of radiation detection device primarily focuses on measuring environmental radiation levels?

Environmental survey devices are specifically designed to measure radiation levels in the environment. These devices collect data on background radiation from various sources, including natural and artificial sources in the surrounding area. They play a crucial role in monitoring environmental safety, assessing potential radiation exposure risks, and ensuring compliance with regulations regarding radiation levels in public spaces.

While personal dosimetry devices are tailored for measuring the radiation dose received by individual workers, and equipment survey devices are used to evaluate the safety of specific pieces of equipment, environmental survey devices encompass a broader scope. Portable survey meters, although capable of measuring radiation in the field, may not focus solely on environmental levels, as they can be used for both environmental and equipment assessments. Thus, environmental survey devices are specifically built to continuously monitor and report on radiation levels in the environment, making them the most appropriate choice for this question.