Device For Clamping A Hose Line, Medical Treatment Device With A Device For Clamping A Hose Line, And Method For Monitoring A Device For Clamping A Hose Line

The invention relates to an apparatus for clamping a hose line, comprising a clamping body 19, an electromagnetic actuation unit 20 for the clamping body and a monitoring device 23 which monitors the position of the clamping body, the actuation unit 20 comprising a coil 21 for generating a magnetic field. The invention also relates to a medical treatment apparatus, in particular an apparatus for extracorporeal blood treatment, comprising an apparatus 14 for clamping a hose line, and to a method for monitoring an apparatus for clamping a hose line. The monitoring device 23 has a measurement device 24 for measuring an electrical property of the coil 21 that is dependent on the position of the clamping body 19, and an evaluation device 25 for determining the position of the clamping body 19 on the basis of the electrical property of the coil. Given that only one electrical property of the coil 21 is monitored, an additional mechanical component is not required for monitoring. In a preferred embodiment of the invention, the inductance L of the coil 21 is an electrical property that is dependent on the position of the clamping body 19. A measurement device 25 is provided in order to measure the inductance L of the coil.