Capacitive sensor and a method of manufacturing a capacitive sensor

Capacitive sensor for detecting a measured variable, with: a cavity (10) having a lateral extent (B), wherein the cavity (10) has a compared to the lateral extent (B) slightly outwardly curved outer wall (20), wherein in the cavity (10) (a dielectric liquid 30) a portion (40) of the cavity (10) leaves free, can be introduced, and wherein the part (40) has a different dielectric constant than that of the dielectric fluid (30); and a first surface electrode (50) formed on a side wall of the cavity (10), and a second surface electrode (60), which is formed on one of the side wall opposite side wall, wherein the first and second surface electrode (50, 60) in the cavity (10) are designed such that a movement (.DELTA.s) of the part (40) in the dielectric fluid (30) along the outwardly curved outer wall (10) in response (to the measured variable to a change in capacitance between the first and second surface electrode 50 , 60) leads, ...