Which type of dosimeter is least affected by moisture?

Thermoluminescent dosimeters (TLDs) are the type of dosimeter that is least affected by moisture due to their specific design and composition. TLDs use lithium fluoride or similar materials to measure radiation exposure. The crystalline structure of the material is relatively stable and does not absorb moisture significantly, thus maintaining the integrity of the dosimeter readings even in humid environments.

Unlike film badges, which rely on photographic film that can be adversely affected by moisture and humidity leading to fogging or inaccurate readings, TLDs are less prone to such issues. Electronic dosimeters may also be affected by humidity, particularly if they contain electronic components that could corrode or malfunction when exposed to moisture. Optically stimulated luminescent dosimeters (OSLs) are more moisture-resistant than film badges, but they can still show some sensitivity to high humidity levels. Therefore, TLDs stand out as the most reliable choice when it comes to moisture exposure, ensuring accurate measurements in various environmental conditions.