How often should continuous radon monitors be calibrated?

Calibrating continuous radon monitors is essential to ensure the accuracy and reliability of the readings they provide. Manufacturers typically specify that these devices should be calibrated annually. This annual calibration helps to verify that the measurement equipment is functioning correctly and can provide accurate radon levels over time.

Calibrating too frequently, such as monthly or quarterly, may be unnecessary and could lead to increased costs and workload without proportional benefits. Conversely, calibrating every five years may not be sufficient to maintain the device's accuracy, especially if the device is being used in environments where changes in temperature, humidity, or other factors could affect its performance. Therefore, annual calibration aligns with best practices recommended by manufacturers, ensuring consistent and reliable radon measurement.