The 3-meter gas absorption cell for light transmission and emission is designed for various gas spectral analysis and detection applications. Its optical path employs a SlimBoss Gas Cell – a flat-waveguide gas cell featuring a proprietary patented design and exceptional optical stability – complemented by a highly stable optical packaging structure. The cell primarily consists of a gas chamber, mirrors, standard optical fiber connectors, gas inlet and outlet ports, and a vibration-damping base.The unique suspended optical path design ensures outstanding vibration and temperature stability, enabling reliable operation in diverse and complex environments, making it ideal for real-time online gas detection. With its low system noise, this device is suitable for trace gas analysis.