Evaluation of consumer digital radon measurement devices: a comparative analysis

Area of Science:

• Environmental Science
• Instrument Science

Background:

• Radon gas poses a significant indoor air quality risk.
• Accurate monitoring is crucial for public health and safety.
• Consumer-grade digital radon monitors offer accessible detection solutions.

Purpose of the Study:

• To evaluate the accuracy and precision of eight consumer-grade digital radon monitors.
• To assess device performance against established industry standards (ANSI/AARST MS-PC).
• To determine the reliability of these monitors across different radon concentration ranges.

Main Methods:

• Utilized the KSU secondary radon chamber for controlled exposure.
• Tested eight digital radon monitor models under three radon concentration levels for 7 days.
• Evaluated performance based on Individual Percent Error (IPE) and Coefficient of Variation (CV) against ANSI/AARST MS-PC standards.

Main Results:

• All eight monitors met the CV requirement at mid and high radon concentrations.
• Seven of eight monitors met the IPE requirement at mid-range radon levels (12.8-15.5 pCi/L).
• Six of eight monitors met the IPE requirement at ambient room radon levels (approx. 0.6 pCi/L).

Conclusions:

• Consumer digital radon monitors demonstrate acceptable performance, particularly at higher concentrations.
• Accuracy may be reduced at lower radon levels, warranting careful consideration.
• Long-term performance evaluation is recommended to ensure sustained accuracy and precision.