Connection pieces for measuring instruments, and which is provided with such a connection piece, the measuring probe

摘要

The invention relates to a connector for measuring instruments for examining a fluid flowing inside a conduit, comprising a discoid built-in ring (11), which has two essentially planar faces (12, 12'), an outer lateral surface (13), and an inner lateral surface (14) defining an axial through opening (15). The built-in ring (11) has at least one radial bore hole (16), which leads to the outer lateral surface and can be connected to a measuring instrument. The invention also relates to a measuring probe provided with a measuring instrument of this type, and to the use of this measuring probe in a method for producing (meth)acrylic acid alkyl esters by reacting (meth)acrylic acid with alkanols.