If the TEM holder is exposed to the atmosphere for an extended period, water vapor and residual contaminants in the air can adhere to the surface of the holder. When it is reinstalled with the sample and inserted into the TEM, it significantly prolongs the pumping time of the TEM. Furthermore, the residual contaminants can pollute the observed sample and TEM chamber.

THS 05 utilizes a dry pump to rapidly generate a clean vacuum at the order of 100 Pa. Storing the sample and holder within the vacuum storage station ensures maximum isolation from atmospheric water vapor and pollutants. This consequently enhances the vacuum level and cleanliness of the TEM chamber, reducing the pumping time for introducing samples.