Method and apparatus for manufacturing a glass body

A method for the automatic manufacture of a glass body for a potentiometric sensor, comprising the steps of:

• loading a first spindle of a glass lathe with an outer glass tube and an inner glass tube, so that the outer glass tube and the inner glass tube are arranged coaxially with one another and with an axis of rotation of the first spindle of the glass lathe, each of the inner glass tube and the outer glass tube has a media-side end, and the two media-side ends are positioned in defined axial positions relative to one another;
• loading a second spindle with an auxiliary glass tube, so that the axis of rotation of the second spindle is arranged coaxially with the axis of rotation of the first spindle;
• bringing the auxiliary glass tube into a contiguous relationship with the outer glass tube;
• fusion joining the outer glass tube with the auxiliary glass tube, in order to form a combined, outer tube;
• producing a connection between the outer tube, composed of the outer glass tube and the auxiliary glass tube, and the inner glass tube;
• after completion of the steps of fusion joining the outer glass tube with the auxiliary glass tube, in order to form a combined glass tube, and of producing a connection between the outer tube, composed of the outer glass tube and the auxiliary glass tube, and the inner glass tube removing a remainder of the auxiliary glass tube from the outer tube;
• producing a media-side opening of the inner glass tube;
• and
• forming a media-side edge of the media-side opening.