Automotive CO₂ Infrared Sensor (NDIR)
Real-time in-cabin CO₂ monitoring with intelligent HVAC coordination for smart ventilation and healthy cabin management
The CO₂ sensor adopts an automotive-grade non-dispersive infrared (NDIR) measurement principle. A dedicated infrared light source emits light at a specific wavelength through the air sampling chamber, where it is received by an infrared detector. Based on the absorption characteristics of CO₂ molecules, the sensor calculates in-cabin CO₂ concentration in real time. The design incorporates a high-stability light source, long-life optical filter components, and an optimized airflow chamber structure, enabling stable output even under continuous vibration, high humidity, condensation, and rapid temperature changes inside the vehicle. The sensor provides real-time CO₂ concentration data and works closely with the vehicle HVAC system: when CO₂ concentration rises, such as during long periods of closed-cabin driving or multi-passenger use, it can automatically trigger fresh air intake or increase fan speed to accelerate cabin air exchange. When outside air conditions are poor, it can also work with air filtration and purification modules for intelligent adjustment.
Key Advantages
High Accuracy
Using a highly reliable NDIR infrared solution, the sensor achieves ±(30 ppm + 3%) accuracy, meeting the precision requirements for in-cabin CO₂ control and automatic ventilation strategies.
High Consistency
Equipped with a self-developed infrared optical calibration and aging system, it ensures consistent output in mass production and stable performance across different vehicles and installation positions.
Automotive-Grade
Designed to automotive-grade standards, the product operates reliably from -40°C to 85°C and features strong resistance to vibration, condensation, and high humidity. Both the light source and detector include temperature compensation to reduce temperature drift.
Cost-Effective
The infrared light source, detector, and chamber structure are independently designed and produced, reducing material cost through structural optimization while also lowering power consumption for large-scale vehicle integration.
CO₂ Series
The CO₂ sensor works closely with the in-vehicle system to monitor in-cabin carbon dioxide concentration in real time and display the data clearly on the central control screen. During long periods of closed-cabin driving, multi-passenger travel, or poor outdoor air conditions, in-cabin CO₂ concentration can continue to rise, causing drowsiness and reduced attention, especially for the driver, which may affect driving safety. The sensor transmits concentration changes to the HVAC system in real time, allowing the vehicle system to automatically activate fresh air intake and increase ventilation as needed. Through intelligent monitoring and proactive control, the vehicle can effectively reduce fatigue risk caused by elevated CO₂ levels, maintain a healthier cabin environment, and improve both driving safety and passenger comfort.
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