1. Product Overview
The AEGTEST HOUND-1011S is a portable radon detector designed for continuous monitoring of radon gas levels in residential environments. It features a high-precision semiconductor sensor for accurate readings and provides both audible and visual alarms when radon concentrations exceed user-defined thresholds. This device supports multiple timeframe readings and can store up to 504 days of historical data, offering comprehensive long-term monitoring capabilities.
The detector displays radon levels in either pCi/L or Bq/m³, allowing for flexibility based on regional standards. Its compact and lightweight design, coupled with a long-lasting internal battery, makes it suitable for various monitoring locations within a home.

Image 1: Front view of the HOUND-1011S detector displaying radon levels and recommended actions.
2. Safety Information
Radon is a naturally occurring radioactive gas that can accumulate in buildings. Long-term exposure to elevated radon levels can pose significant health risks, primarily increasing the risk of lung cancer. It is the second leading cause of lung cancer after smoking. This detector is designed to help identify areas with high radon concentrations, enabling users to take appropriate mitigation steps.
3. Package Contents
- 1 × HOUND-1011S Portable Radon Detector
- 1 × USB Type-C Charging Cable
- 1 × Lanyard
- 1 × User Manual

Image 2: The HOUND-1011S detector, its packaging, USB-C charging cable, and user manual.
4. Setup
- Power On: Long press the power button (usually located in the center) to turn on the device.
- Initial Placement: Place the detector in the area where you intend to monitor radon levels long-term. Ensure the device is stable and not subject to vibration or frequent movement.
- Charging: For continuous monitoring or if the battery is low, connect the device to a power source using the provided USB Type-C cable. The built-in battery can last up to 45 days in sleep mode without charging, making it suitable for travel or temporary placements.
5. Operating Instructions
- Viewing Records: Short press the power button to cycle through different display modes, view historical records, or access menu options.
- Changing Units: The device supports switching between pCi/L and Bq/m³. Refer to the on-screen menu for unit selection.
- Setting Alarm Thresholds: Customize the radon level at which audible and visual alarms are triggered through the device's menu settings.

Image 3: The detector showing visual and audible alarm features for radon level alerts.
6. Monitoring and Data
- First Reading: The device provides its first radon level reading within 12 hours of activation.
- Hourly Updates: After the initial reading, the device updates radon levels hourly for real-time accuracy.
- Historical Data: The HOUND-1011S can store up to 504 days of historical radon data. This allows for comprehensive long-term monitoring and analysis of radon trends over extended periods. The LCD screen displays data for various timeframes, including 12H, 24H, 48H, 72H, and 96H averages.

Image 4: Illustration of the high-precision semiconductor sensor and the 12-hour fast reading capability.

Image 5: The detector's ability to track and store up to 504 days of historical radon data.
7. Precautions and Placement
7.1 Precautions
- Avoid Vibration or Movement: After any movement, stabilize the device in its new location and initiate a new test for accurate results.
- Avoid Strong Light: Direct sunlight or strong artificial light sources (e.g., flash) can affect readings. If exposed, place the device in a dark area (e.g., drawer) for 1-2 hours, then retest. Normal indoor lighting does not impact results.
- Avoid High Humidity: High humidity can influence sensor performance. If necessary, place a desiccant near the air inlet of the device, then start a new test.
7.2 Recommended Placement
Radon typically enters buildings through foundation cracks, openings, and from soil, rocks, or groundwater. Place the detector in areas where radon may accumulate, such as:
- Basements
- Garages
- Near floor cracks or sumps
- Ground-level living areas

Image 6: Suggested placement locations for the radon detector, including basements and living areas.
8. Troubleshooting
- Q: The reading appears too high.
- A: Retest after ensuring the device is stable and has not been moved. Movement can temporarily affect initial readings. Allow the device to settle in its location for at least 12 hours for an accurate first reading.
- Q: No reading is displayed after restarting the device.
- A: Restarting the device initiates a new measurement cycle, resetting the 12-hour measurement period. The device will begin a new test. Historical data remains accessible in the 'DATA' menu.
9. Specifications
| Feature | Detail |
|---|---|
| Model Number | HOUND-1011S |
| Brand | AEGTEST |
| Measurement Range | 0.09 to 1000 pCi/L |
| Sensor Type | High-precision semiconductor sensor |
| First Reading Time | Within 12 hours |
| Data Storage | Up to 504 days of historical data |
| Battery Type | 1 Lithium Ion battery (included) |
| Battery Life (Sleep Mode) | Up to 45 days |
| Charging Port | USB Type-C |
| Alarms | Audible and Visual |
| Display | LCD screen |
| Color | Grey |
| Item Weight | 280 g |
| Manufacturer | AEGTEST |
| Country of Origin | China |

Image 7: The detector highlighting its long battery life of up to 45 days on a single charge in sleep mode.
10. Warranty and Support
Specific warranty details and direct support contact information are not provided in the product description. Please refer to the documentation included in your product package or contact the retailer where the device was purchased for warranty claims and technical support.
