Which personnel monitoring device is known to deliver an immediate reading?

The pocket ionization chamber is designed to provide immediate readings of ionizing radiation exposure. This device contains a small ionization chamber that reacts to radiation exposure, producing an electrical charge that is directly proportional to the radiation dose received. Users can quickly check the exposure level by looking at the scale of the device, making it advantageous in situations where real-time monitoring is essential.

In contrast, thermoluminescent dosimeters, film badges, and personal dosimeters typically require processing or special equipment to read the exposure levels after a certain period. Thermoluminescent dosimeters work by accumulating energy from radiation, which is then released and measured when heated. Film badges rely on the exposure of photographic film, which must be developed to evaluate the dose. Personal dosimeters encompass a range of devices but usually do not provide immediate feedback like pocket ionization chambers do. Thus, the pocket ionization chamber stands out for its capacity for real-time monitoring.