Utilizing the ROBIN Radon Sensor for Demand-Controlled Ventilation
The ROBIN is a light, compact, and state-of-the-art industrial radon monitor designed for demand-controlled ventilation in facilities that require precise radon level monitoring, such as schools, office buildings, and mining environments.
How the ROBIN Sensor Works
The ROBIN sensor is a specialized instrument that converts ambient radon concentration into a proportional output signal. This feature is critical for helping to optimize energy efficiency while maintaining indoor air quality.
- Measurement: ROBIN continuously measures the radon levels in the air, expressed in picocuries per liter or becquerels per cubic meter.
- Conversion: The sensor converts the measured radon concentration into a proportional analog output signal of 1-10V.
- Control: This analog signal is then fed to a fan controller, a programmable logic controller (PLC), or any other device suitable for analog input.
- Ventilation Adjustment: The receiving device uses the 1-10V signal to modulate the power or speed of a ventilation system (like air handling units, roof fans, or radon evacuation fans). This ensures that the amount of ventilation is accurately proportional to the current radon level.
Key Installation and Usage Features
The ROBIN’s rugged aluminum design makes it useful for professional applications by radon mitigators and environmental engineers.
Installation Versatility
- Fixed Installation: The sensor is designed for fixed installation and can be placed in locations such as:
- Ventilation ducts (supply or return ducts).
- Air handling units (AHUs).
- Stationary in a room or underground environment.
- Airflow Independence: The ROBIN functions independently of air flow conditions, ensuring accurate measurements in both laminar and turbulent airflow.
- Power: It requires a 10-30V power supply to operate.
Sensor Specifications
| Specification | Description |
| Output Signal | 1-10V signal (proportional to radon concentration) |
| Standard Ranges | 0-11 pCi/L or 0-110 pCi/L, 0-400 Bq/m3 or 0-4000 Bq/m3 (customizable on request) |
| Immunity | High immunity to electromagnetic interference |
| Mining Version | Reinforced design with additional PCB painting and thermal load to prevent condensation in high-humidity underground environments. |
ROBIN Applications
The primary use of ROBIN is to achieve energy-optimized radon mitigation by addressing the fact that radon levels fluctuate significantly over time.
Industrial, Schools, and Office Buildings
- Demand Ventilation: ROBIN is used to regulate the amount of outdoor air supplied or exhausted. By only increasing ventilation when radon levels are high, facilities can save energy compared to running fans constantly at maximum power.
- Example: Placing ROBIN in the return duct of a school building to regulate the air return based on the measured radon concentration.
Mining Industry
- Safety Monitoring: A reinforced, high-range version of ROBIN is used for fixed installations in underground environments to continuously monitor radon levels, ensuring worker safety and compliance with ventilation standards.
By providing a precise and reliable signal, the ROBIN sensor allows professionals to design and implement highly efficient ventilation strategies, minimizing radon exposure while reducing the overall energy footprint of a building or facility.
Published
November 19, 2025
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