Which factor is crucial for the reliability of radiation measurement devices?

Calibration of the device is crucial for the reliability of radiation measurement devices because it ensures that the measurements taken are accurate and consistent. Proper calibration involves adjusting the device to respond correctly to known radiation levels, which allows users to trust the readings obtained during operation. This process corrects for any deviations that may occur due to environmental factors, the type of detector, or aging of the device components. Regular calibration is essential to maintain the precision and effectiveness of radiation detection in various applications, including medical, industrial, and environmental contexts. Thus, without proper calibration, a device may provide misleading readings, ultimately affecting safety and decision-making based on those measurements.