The positive pressure sealer is a special instrument for the sealing performance test of perfume bottles. Perfume is no stranger to people, and women who love beauty are often carried with them. Then if the bottle cap of the perfume bottle is not good, the perfume will flow out, which is that the bottle cap of the perfume bottle is not screwed well, that is, the sealing performance of the perfume bottle cap is not good. Perfume bottle sealing performance refers to the sealing ability of the bottle cap and the bottle mouth. Alcohol is one of the main components of perfume, and the characteristics of alcohol are flammable and volatile. Therefore, the sealing performance of perfume cap is a property worth checking. The positive pressure sealer is a kind of sealing performance and processing technology for detecting and verifying the cap by using a compressed air source to control the pressure and time through a microcomputer. The positive pressure sealer can be widely used in the manufacturers, research institutes and quality inspection institutions of plastic anti-theft caps and composite tanks.