| 摘要 |
The invention relates to an apparatus for measuring volume- or mass-flow of a medium (11) flowing through a measuring tube (2) in the direction of the measuring tube axis (3), and includes: A magnet system (6, 7; 17), which produces a magnetic field (B) passing through the measuring tube (2) essentially transversely to the measuring tube axis (3); at least one measuring electrode (4; 5), which contacts the medium (11) in a defined surface region; and a control/evaluation unit (8), which provides information concerning volume- or mass flow of the medium (11) in the measuring tube (2) on the basis of a measurement voltage induced in the at least one measuring electrode (4, 5); wherein at least the medium-contacting surface region of the at least one measuring electrode (4, 5) is manufactured of a chemically inert and electrochemically and mechanically resistant material.
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