A fiber quality sensor (S) comprises a first pair of mutually adjacent electrodes arranged for contacting the fiber to generate a first voltage over the electrodes, the first voltage being indicative of the quality of the fiber, the first pair of electrodes including a first conductive electrode (1), and a first dielectric electrode (D, 2) having a first dielectric material (D) with a conductive backing (2). The fiber quality sensor (S) may further comprise a second pair of electrodes arranged for contacting the fiber to generate a second voltage over the electrodes, the second voltage being indicative of the quality of the fiber, the second pair of mutually adjacent electrodes including a second conductive electrode (1), and a second dielectric electrode (D, 2) having a second dielectric material with a conductive backing, wherein in a tribo-electric series of materials, the material of the conductive electrode is arranged between the first and second dielectric materials. The fiber quality sensor (S) may comprise horizontally or vertically alternating first and second pairs of electrodes. The first and/or second pairs of electrodes may be tilted, slanted and/or zigzag-shaped. The fiber quality sensor (S) may for the or each pair of electrodes further comprise an amplifier coupled to the pair of electrodes and having an input impedance exceeding 1 ΤΩ, and preferably being 200 ΤΩ. The fiber quality sensor (S) is advantageously applied in a hair care device.La présente invention concerne un capteur de qualité de fibre (S) qui comprend une première paire d'électrodes mutuellement adjacentes agencées pour entrer en contact avec la fibre pour générer une première tension sur les électrodes, la première tension étant indicative de la qualité de la fibre, la première paire d'électrodes comprenant une première électrode conductrice (1), et une première électrode diélectrique (D, 2) ayant un premier matériau diélectrique (D) avec un support conducteur (2). Le capteur de qua
