The Doble series liquid nitrogen tank can be used for transporting samples in the gas phase at temperatures of -150 ℃ or below, as well as for long-term storage of samples in the liquid phase. Using advanced QWickTM adsorption technology, liquid nitrogen can be fully absorbed within two hours, and gas-phase transportation operations can be achieved on the same day. The unique adsorbent material at the bottom of this series of liquid nitrogen tanks can absorb liquid nitrogen and serve as a sample transport tank, with a maintenance time of up to 30 days. After arriving at the final destination, fill the liquid nitrogen tank with liquid nitrogen to serve as a sample storage tank for long-term storage of samples, without the need to return the liquid nitrogen tank.