M401D integrates core technologies including wSmartGas® and low-temperature rapid measurement, delivering full-accuracy EtCO₂ readings instantly at startup and reliable performance across temperatures from 0°C to 50°C. The consumables are designed with an ultra-low dead volume space, enabling the module's application in scenarios with stringent dead volume requirements. Suitable for in-hospital and out-of-hospital emergency transport, ICU, and critical care, the module is widely used in Class II and III medical devices. It supports both reusable and single-use consumables, enabling accurate EtCO₂ monitoring for adults, children, and neonates in OR, ICU, NICU, and emergency/trauma settings.