Power supply: 2*1.5V AAA Battery (Not Included)

Display: LCD screen display（no back light)

FAQ:

Q1:What is radon gas?
Answer:
Radon gas is a radioactive noble gas primarily originating from the decay of uranium in soil and rock formations. It typically infiltrates buildings through ground penetration. With a higher density than air, radon tends to accumulate in lower
areas,particularly near floor surfaces.

Q2: Does the radon concentration measured at floor level by the detector equal airborne radon concentration?
Answer:
No. Radon concentrations near floor surfaces may exceed those at elevated positions due to radon's higher density, which causes gravitational settling. Measurements taken directly on the floor reflect source-proximal concentrations, whereas central or elevated areas of the room may exhibit lower values.

Q3: How long does the device require to display accurate readings?
Answer:
Measurement duration varies by operational mode:

Rapid Mode: Delivers stabilized readings within 48 hours of initial activation.

Long-Term Mode: Requires continuous monitoring for at least 7 days to establish spatial average concentrations.

Q4: Where should the detector be positioned?
Answer:

Floor-level measurement: Place the device horizontally on the floor.
Wall-proximate measurement: Mount the device vertically on the wall.

Breathing-zone measurement: Position the device approximately 1 meter above floor level.
Note: Avoid areas with airflow disturbances such as air conditioner vents or radiators.

Q5: Can this device test radon in water?
Answer:
This instrument is exclusively designed for air medium analysis. For aqueous radon testing,
use dedicated hydro-radon testing equipment to prevent sensor damage.

Q6: At what concentration threshold should corrective action be taken?
Answer:
Per WHO safety guidelines:
2.70 pCi/L (100 Bq/m³): Implement mitigation measures (e.g., enhanced ventilation, crack sealing).
8.10 pCi/L (300 Bq/m³) : Engage certified professionals for structural remediation.

Q7: Why do radon readings exhibit sudden fluctuations?
Answer:
As a gaseous radioactive element, radon concentrations are dynamically influenced by:
Atmospheric pressure changes
Temperature/humidity variations
Ventilation rate shifts (e.g., door/window operation)
Intermittent soil gas infiltration

Resolution:
Maintain continuous monitoring for ≥48 hours
Conduct critical measurements only after maintaining closed conditions for 12 hours

Q8: When should manual calibration be performed?
Answer:
Initiate calibration under these conditions:
Following significant environmental condition changes
Upon detection of abnormal measurement deviations

Precautions