Which type of device is specifically used for continuous measurement of radon levels?

The device that is specifically used for continuous measurement of radon levels is the continuous radon monitor. This type of device provides real-time data on radon concentrations in the environment, allowing for ongoing monitoring and immediate results. Continuous radon monitors typically use electronic detection methods, which enable them to measure and record radon levels continuously over a period of time—this capability is crucial during radon mitigation assessments or for homes where long-term exposure needs to be evaluated.

In contrast, passive diffusion devices are designed to collect radon samples over a fixed period, usually days or weeks, but do not provide continuous readings. Grab sample devices take a measurement at a specific moment in time, thereby giving a snapshot rather than continuous data, which can miss fluctuations in radon levels throughout the day. Radiation survey meters measure radiation levels in general but are not specifically designed to measure radon concentrations over time.