Changes the mechanical timer of Type 420B boiling sterilizer into an electronic timer and adds a display circuit so as to make its timing ocular, operation stable and maintenance easy.

Theme display options are readily available at the top of the sidebar allowing visitors to change album and item view options and slide show timing and direction.

Thie controller has a digital display and precise timing function, and has been used in several sorts of the microwave equipment because of its simple hardware circuit and reliable control method.