Which of the following is NOT a common type of personal dosimeter used in occupational settings?

• A. Film badges
• B. Geiger counters
• C. Electronic personal dosimeters (EPDs)
• D. Thermoluminescent dosimeters (TLDs)

Answer: (B)

In occupational radiation protection, personal dosimeters are devices worn to record the total radiation dose a worker accumulates over a monitoring period. Film badges and thermoluminescent dosimeters (TLDs) are passive devices that store energy from ionizing radiation and are read out later to provide a cumulative dose. Electronic personal dosimeters (EPDs) give real-time readings and can warn you if exposure exceeds limits. A Geiger counter, however, is a survey instrument designed to measure radiation rate in the environment rather than to accumulate dose over time. It’s highly energy-dependent and doesn’t inherently provide a reliable, integrated dose for a worker, making it unsuitable as a standard personal dosimeter for regulatory monitoring. Therefore, Geiger counters are not commonly used as personal dosimeters in occupational settings.