MZD uses proprietary technology-enhanced TDLS for gas detection, where a 0.05 nm narrow bandwidth diode laser beam scans across an absorption band of the target gas, performing a high-resolution near-infrared absorption measurement. Use laser diode light sources of different wavelengths according to the gas molecules, and then measure the intensity of the transmitted light (I) and incident light (I0) at the detector (Lambert-Beer law) to know the current gas concentration measurement chamber.