What is a disadvantage of using electret ion chamber devices?

Electret ion chamber devices are sensitive to external factors that can compromise their accuracy and reliability. One significant disadvantage is that they can be damaged or affected by external contamination. This includes various substances that may be introduced to the device, which can hinder its ability to measure radon levels correctly. Contamination can occur from dust, environmental pollutants, or other particulates that interfere with the ionization process essential for accurate readings.

While lower costs and minimal sensitivity to gamma radiation may be perceived as benefits in some contexts, they do not address the potential for external contamination, which poses a direct impact on the integrity of the measurements. Similarly, the need for specific conditions, such as temperature calibration, is important for ensuring accuracy, but it does not reflect the fundamental vulnerability to damage from outside contaminants that can impede the efficacy of the device. Thus, recognizing the impact of external factors is vital for understanding the limitations associated with using electret ion chamber devices in radon measurement scenarios.