No matter what type of security door, its detection principle is the same, magnetic field induction technology. That is to say, if there is metal material passing through this door, it will destroy the magnetic field of the door itself, then it will be sensed by the metal detector door, and an alarm sound will be issued to indicate that a dangerous item has appeared and attention needs to be paid.

The benefits of installing security doors in production companies: To prevent the theft of precious metals and technical products, and to apply scientific, objective, humane, and effective protection and deterrence in factories. This is because security doors have: High accuracy and adjustable, objective, no human factors interference, no search, respect for employees, speed, and ease of manipulation.

Public places, discotheques, dance halls, and public security companies have the advantage of installing security doors: improving security. In these places, there are many people and there are often lawless elements who carry weapons and other prohibited items to commit crimes and commit crimes, causing major casualties and property losses, and causing extremely bad negative effects on society. To prevent such terrorist incidents, security inspections It is one of its most effective tools.

In short: understand the working principle of security doors, the advantages of installing security doors, can help users more quickly understand the security door. The sensitivity of the security door is not as high as possible, and it is necessary to recommend an appropriate security door and its sensitivity according to the needs of the user. The security doors and sensitivities required in different places are not the same, and only when they are known can they choose their own security door.

The Vacuum Drying Oven(vacuum tray dryer) is a static dryer. It is used to dry fruit, vegetables, chemical product or pharmaceutical product. As it works in low temperature and high vacuum, it can yield high quality product.


Vacuum Drying Oven is widely applicable for drying and sterilization in fields of biochemistry, pharmacy, medicine and health, agriculture and scientific research and environment protection. It is designed specially for drying of material which is thermo-sensitive and oxidative easily.



  • It has follow advantages compare with the routine dry technology:
  • Vacuum environment greatly reduced the liquid boiling point which needs to drive out, therefore the vacuum dry method is applicable for heat sensitivity material;
  • For the sample that can't be dried easily, such as powder or other pellet form sample, using vacuum dry method may efficiently shorten dry time;
  • Various complex structures of machinery ministry or other porous sample process are used of vacuum dry method after washing, and Completely dry without leaving any residue;
  • Use more safe: under vacuum or inertia condition, completely eliminate the possibility that the oxide heated and explode;
  • Compare with the normal drying depended on air cycle, Powder samples will not be blown or moved by air


Vacuum Drying Oven

Vacuum Drying Ovens, Vacuum Drying Chamber, Vacuum Drying Equipment, Vacuum Drying Machine

Changzhou Ruide Drying Engineering Technology Co., Ltd , http://www.rddryer.com