The portable natural gas odorant (tetrahydrothiophene) microchromatographic analysis system strictly adheres to the requirements of GB/T 40704-2021 standard. It employs high-sensitivity Micro-TCD technology and is specifically designed for rapid on-site detection of natural gas odorant (tetrahydrothiophene) content. The instrument features a single-channel integrated design, incorporating a built-in battery, carrier gas, and a trolley-style portable protective case, catering to the immediate detection needs of emergency sites and mobile locations.