The AT2004BIV-CO is a professional carbon monoxide detector designed for car parks, targeting the toxic gas from incomplete automobile combustion. Its 2-wire design integrates power and signal transmission without external 24V power, simplifying wiring for large-area car parks. A conformal coating forms a protective layer on internal components, providing superior oil, water, and dust resistance to adapt to harsh car park environments. Equipped with high-sensitivity sensors, it detects CO concentration in real time with fast response and high accuracy, sending alarms promptly to trigger ventilation and evacuation. With good compatibility and expandability, it connects to central monitoring systems. Compact and easy to install, it provides a solid safety barrier for car park operation and personnel safety.