Which statement about active dosimetry is true?

Which statement about active dosimetry is true?

• A. It records dose without power using film badges or TLDs.
• B. It requires periodic replacement and only provides annual readings.
• C. It provides real-time readouts and alarms via electronic dosimeters.
• D. It cannot be used for personal monitoring.

Answer: (C)

Active dosimetry relies on electronic dosimeters that require a power source, which enables continuous monitoring of dose and dose rate. Because they stay powered, they can provide real-time readouts and trigger audible or visual alarms if exposure levels or rate exceed predefined limits. This immediate feedback is what makes them essential in situations where quick actions may be needed to protect workers. In contrast, film badges and thermoluminescent dosimeters are passive devices that store dose information without power and must be processed later to read the results, so they don’t offer real-time alarms. While passive systems often yield periodic or annual readings, active dosimeters continuously report data (though they do require periodic battery maintenance). And yes, active dosimetry is intended for personal monitoring, not for eliminating the possibility of monitoring workers at risk.

Active dosimetry relies on electronic dosimeters that require a power source, which enables continuous monitoring of dose and dose rate. Because they stay powered, they can provide real-time readouts and trigger audible or visual alarms if exposure levels or rate exceed predefined limits. This immediate feedback is what makes them essential in situations where quick actions may be needed to protect workers.

In contrast, film badges and thermoluminescent dosimeters are passive devices that store dose information without power and must be processed later to read the results, so they don’t offer real-time alarms. While passive systems often yield periodic or annual readings, active dosimeters continuously report data (though they do require periodic battery maintenance). And yes, active dosimetry is intended for personal monitoring, not for eliminating the possibility of monitoring workers at risk.