Where to Place the Device in a Room

For accurate readings, the Aranet Radon One sensor should be placed where radon is most likely to accumulate and where people actually spend time. In homes, this is typically the lowest regularly occupied level (such as a basement or ground floor). Position the device 0.8–2 meters (2.5–6.5 ft) above the floor, in an open area with normal air circulation. Avoid placing it near windows, doors, ventilation outlets, or exterior walls, as drafts and fresh air can dilute radon levels and distort measurements. Do not place the sensor in kitchens, bathrooms, or directly next to heat sources or electronic devices. A stable, central location away from direct sunlight will provide the most representative long-term radon measurements.

The Aranet Radon One sensor should not be placed in direct sunlight or in areas with a risk of splashing the sensor with different liquids, or high-humidity environments (higher than 85%), such as your bathroom. Place the sensor in a safe place where it cannot accidentally be dropped because it isn’t drop-proof.