Radon is a naturally occurring radioactive gas that can accumulate in indoor environments such as homes, schools, offices, and underground spaces. Because radon is invisible, odorless, and difficult to detect without professional equipment, reliable radon sensors have become an important solution for continuous indoor air quality monitoring.

   A modern radon sensor module can detect radon concentration in real time by measuring the radiation particles released during radon decay. These compact sensor modules are widely integrated into fixed radon detectors, smart home monitoring devices, and environmental monitoring systems.

    What Is a Radon Sensor?

    A radon sensor is an electronic detection component designed to measure the concentration of radon gas (Rn) in the surrounding environment.

    Unlike traditional gas sensors that detect chemical reactions, radon sensors work by detecting the radioactive decay characteristics of radon. When radon atoms decay, they release alpha particles. The sensor captures these alpha particles and converts the radiation signals into digital concentration data.

    TXD100 radon detection module uses an alpha particle detection method to achieve accurate and stable radon concentration monitoring. It is designed as a compact module solution for integration into various radon monitoring devices. 

    How Does a Radon Sensor Work?

    1. Radon Gas Enters the Detection Chamber

    Radon gas naturally diffuses from the surrounding air into the sensor module through the airflow structure.

    TXD100 adopts a free diffusion design, allowing radon gas to enter the sensing area naturally without requiring an external pump system. This structure makes the module suitable for indoor applications where long-term monitoring is required.

    2. α Particles Are Detected During Radon Decay

    Radon is a radioactive element. When radon atoms decay, they emit alpha particles.

    The internal detection system captures these alpha particles and analyzes the radiation events. The number of detected alpha particles is directly related to the radon concentration in the environment.

    Through this process, the sensor can calculate the radon concentration and provide digital output data for monitoring systems.

    3. Signal Processing Converts Radiation Data into Concentration Values

    After collecting alpha particle signals, the sensor module processes the data through an internal algorithm and outputs the radon concentration value.

    TXD100 provides UART communication output with TTL 3.3V level, allowing easy connection with microcontrollers, display terminals, and IoT monitoring platforms.

    The communication parameters include:

• Baud rate: 9600bps

• Data format: 8 data bits, 1 stop bit

• Output interface: UART TTL 3.3V

    Key Features of an Advanced Radon Sensor Module

    High Accuracy Radon Monitoring

    A reliable radon sensor module needs stable measurement performance for long-term monitoring.

    TXD100 provides:

• Detection range: 0–20000 Bq/m³

• Resolution: 1 Bq/m³

• Data refresh interval: 1 minute

• 4-hour moving average concentration output

      These features allow the module to provide stable radon monitoring results for indoor environments.

     Compact Size for Easy Integration

    Many equipment manufacturers require small sensor components that can be easily integrated into their products.

    TXD100 radon sensor module features:

• Compact structure

• Lightweight design

• Easy UART integration

     Module dimensions:

    52.65mm × 42.50mm × 27.8mm
    Weight: approximately 24.85g

    For manufacturers looking for a reliable radon sensor module, radon detection module, or OEM radon monitoring solution, TXD100 provides an efficient and integration-friendly option for developing next-generation radon detection products.