Understanding Radiation in the Home

• Natural sources: Radon gas, certain rocks, and soil.
• Man-made sources: Smoke detectors, old electronics, some ceramic tiles, and medical devices.
• Why detection matters: Continuous low-level exposure may accumulate over time, posing health concerns.

How a Geiger Counter Works

• Detects ionizing radiation: Alpha, beta, and gamma rays.
• Converts ionization into readable pulses: Counts per minute (CPM) or microsieverts per hour (µSv/h).
• Audible and visual alerts: Immediate feedback for elevated readings.

Step-by-Step Guide to Detect Hidden Radiation

• Ensure it is fully charged or has fresh batteries.
• Calibrate according to the manufacturer's instructions.

2. Establish a Baseline

• Take readings in areas expected to be low in radiation to understand normal background levels.

• Appliances: Old microwaves, televisions, and computers.
• Building materials: Basements, walls, and tiles.
• Nearby sources: Cell towers or medical facilities.
• Move the counter slowly to detect localized spikes.

• Keep a log of CPM or µSv/h values for each area.
• Identify patterns or consistently high readings to focus mitigation efforts.

Interpreting Geiger Counter Readings

• Low readings: Near background levels, generally safe.
• Moderate readings: Slightly above background; monitor and reduce exposure time.
• High readings: Significantly above safe limits; consider shielding or professional assessment.

• Avoid touching the probe while measuring to prevent interference.
• Conduct measurements at different times of day for accuracy.
• Use protective gloves if investigating areas with potential contamination.
• Consult professionals if persistent high readings are detected.

Final Thoughts