The desiccator is a new type of purification device used for transformer oil conservator. The product features: 1. The air purification air is longer and the filtering time is longer, which is more effective than the conventional moisture absorber, increasing by 30%. 2. The purification room adopts transparent glass cylinder and blue color changing silica gel, and the bottom adopts labyrinth air inlet channel. After the oil cup is filled, when the transformer is operating, you can directly see the exhalation and inhalation of the moisture absorber, and observe the oil seal position during operation. It can also observe the internal state of the transformer from the oil cup breathing, effectively preventing the dust and moisture of the air from entering the transformer oil, and ensuring the insulation strength of the transformer oil.