Sterile tube welder is a full-automatic device used for sterile welding of thermoplastic tubes. It can aseptically connect thermoplastic tubes with outer diameter of 1/4 - 3/4 inch. Easy to operate, one-button reset, one-button welding - reset operation may be conducted by one button when top cover is open. Preset program can be used for connection of thermoplastic tubes like C-Flex- and Advanta Flex. Thermal welding allows the weld to have very high strength. Under the non-sterile environment, it's also possible to realize sterile connection. With compact design, it is easy to move and allows easy verification, available to offer verification documents. One machine can weld thermoplastic tubes of various diameters.