Which statement about radon testing devices is true?

Which statement about radon testing devices is true?

• A. They are only used by professionals
• B. They come in passive and active forms
• C. They cannot be used indoors
• D. They are only digital

Answer: (B)

Radon testing devices come in two forms: passive and active. Passive devices, like charcoal canisters or alpha-track detectors, collect radon without power and are later analyzed in a lab after an exposure period. Active devices, such as continuous radon monitors, actively draw air and provide real-time or near-real-time readings, requiring power. These tests are used indoors in homes, and while professionals often conduct testing, homeowners can use many passive tests themselves. They aren’t limited to digital devices—there are non-digital passive tests as well. So, the statement that testing devices come in passive and active forms is true.

Radon testing devices come in two forms: passive and active. Passive devices, like charcoal canisters or alpha-track detectors, collect radon without power and are later analyzed in a lab after an exposure period. Active devices, such as continuous radon monitors, actively draw air and provide real-time or near-real-time readings, requiring power. These tests are used indoors in homes, and while professionals often conduct testing, homeowners can use many passive tests themselves. They aren’t limited to digital devices—there are non-digital passive tests as well. So, the statement that testing devices come in passive and active forms is true.