Which device is used for verifying that no other sources affect radon measurement readings?

The device that is used to verify that no other sources affect radon measurement readings is indeed the blank device. A blank device is essentially a radon detector that is not exposed to the same environments or conditions as the testing device. It allows for the identification of any background noise or interference that could influence radon measurement results. By comparing the readings of the blank device with the active radon test, professionals can determine if external factors, such as temperature fluctuations, humidity, or other gases, may be affecting the accuracy of the radon measurements.

Utilizing a blank device is crucial in ensuring that the results obtained from radon testing are reliable and accurate, enabling professionals to make informed decisions regarding radon mitigation and safety.