A continuous casting device, including a mould, an electromagnetic device arranged outside the mould and arranged to provide an electromagnetic field acting on a melt in the mould, the electromagnetic device being supplied with electric current includes a base frequency and harmonics, and thereby providing a first electromagnetic field based on the base frequency and a second electromagnetic field based on the harmonics, and an inductive sensor, arranged at the mould for the purpose of sensing the position of a meniscus of the melt, and operating at frequencies corresponding to the harmonics. The continuous casting device includes at least one screen between the electromagnetic device and the sensor, and the screen is arranged so as to prevent the second electromagnetic field from disturbing the operation of the sensor but to permit the first electromagnetic field to act on the melt in the region of the meniscus.