Platform is placed to base plate

The utility model relates to a platform is placed to base plate, it includes: the base plate brace table, its bottom surface with the base plate contacts, and will the base plate place in the base plate brace table, the flow path is supplied with to the fluid, its with formed at the hole intercommunication of the bottom surface of base plate brace table to with the form extension that has the the direction of gravity composition, flow sensor, the fluid passes through in its perception unit interval the flow of flow path is supplied with to the fluid, works as the base plate is placed during the bottom surface of base plate brace table, according to passing through variation in discharge in the unit interval that the flow sensor perception was arrived, thereby perception whether placing of base plate to even liquid such as the surface adhesion pure water of the base plate on the base plate brace table also can accurate perception have or not the base plate.