How often should active devices for radon measurement be calibrated?

Active devices used for radon measurement should be calibrated every year to ensure their accuracy and reliability. This annual calibration is crucial because it allows technicians to maintain the precision of the devices that measure radon levels in the environment. Radon measurement devices, like any other type of equipment, can drift over time due to factors like usage, environmental conditions, or component aging. Frequent calibration helps to identify any deviations and correct them, ensuring that the radon levels reported are accurate. This is especially important for maintaining compliance with safety standards and for the effectiveness of radon mitigation efforts.

Calibrating less frequently, such as every two years or even less often, may lead to inaccuracies that could result in unsafe conditions going undetected. Similarly, calibrating every month or every six months may not be necessary and could lead to unnecessary costs and administrative burdens without providing significant additional accuracy. Thus, annual calibration strikes a balance between maintaining device accuracy and practicality in terms of cost and time.