The rotor (50) comprises : - a support (60) intended to be mounted rotatable around a rotation axis (A-A') in a centrifuge enclosure (46); the support (60) having at least one housing (62) for receiving the sample (10); - at least an electrically powered sensor (52) held by the support (60), able to measure a property of the sample (10); - a contactless power receiver (102), able to receive electrical power without contact from a contactless power transmitter (100), the contactless power receiver (102) being carried by the support (60) and being jointly rotatable with the support (60), the contactless power receiver (102) being electrically connected to the or each sensor (52) to electrically power the or each sensor (52) during a rotation of the support (60).
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