NOVELTY - The arrangement has a wind turbine component (20) comprising a first layer (21) and a second layer (22) that are joined together by lamination. A monitoring device (30) comprises a transmitter (31) that generates mechanical compression pulses (33, 34) and a receiver that receives a time-resolved spectrum based on the reflection of the mechanical compression pulse within composite material. The monitoring device is durably attached to the wind turbine component such that the lamination between the first layer and the second layer is continuously monitored.    USE - Arrangement for monitoring lamination between a first layer of a composite material of a component i.e. rotor blade (claimed), of a wind turbine i.e. geared wind turbine, and a second layer of the composite material in a wind park.    ADVANTAGE - The arrangement allows laminated composite material to be designed with improved strength, stability, sound insulation and appearance based on use of differing materials in an efficient manner. The arrangement provides safe, reliable and efficient operation of the wind turbine to ensure that the laminated composite material does not delaminate uncontrollably.    DETAILED DESCRIPTION - The monitoring device is partly attached to the component by adhesive. INDEPENDENT CLAIMS are also included for the following:    (1) a method for continuously monitoring lamination between a first layer of a composite material of a component of a wind turbine and a second layer of the composite material    (2) a condition monitoring system for monitoring a wind park.    DESCRIPTION OF DRAWING(S) - The drawing shows a schematic view of arrangement for monitoring lamination between a first layer of a composite material of a component of a wind turbine and a second layer of the composite material in wind park with a delamination between first and second layer.    Wind turbine component (20)    Layers of wind turbine component (21, 22, 23)    Monitoring device (30)    Transmitter (31)    Mechanical compression pulses (33, 34)