Laboratory sample distribution system, comprising - a number of sample container carriers being adapted to carry one or more sample containers, each sample container carrier comprising at least one magnetically active device, - a transport plane being adapted to support the sample container carriers, - a number of electro-magnetic actuators (120, 125) being stationary arranged below the transport plane, the electro-magnetic actuators (120, 125) being adapted to move the sample container carriers on top of the transport plane by applying a magnetic force to the sample container carriers, and - a control device being configured to control the movement of the sample container carriers on top of the transport plane by driving the electro-magnetic actuators (120, 125) such that the sample container carriers move along corresponding transport paths simultaneously and independently from one another, characterized in that - the laboratory sample distribution system further comprises: - a sensor being adapted to measure supply currents (Id), wherein the electro-magnetic actuators (120, 125) are supplied with electrical energy based on the supply currents (Id) and supply voltages (Udc), and - a monitoring device functionally coupled to the sensor, wherein the monitoring device is adapted to monitor temperatures of the electro-magnetic actuators (120, 125) based on the measured supply currents (Id) and the supply voltages (Udc), wherein the supply voltages are known or measured by the sensor. - a number of sample container carriers being adapted to carry one or more sample containers, each sample container carrier comprising at least one magnetically active device, - a transport plane being adapted to support the sample container carriers, - a number of electro-magnetic actuators (120, 125) being stationary arranged below the transport plane, the electro-magnetic actuators (120, 125) being adapted to move the sample container carriers on top of the transport plane by applying a magnetic force to the sample container carriers, and - a control device being configured to control the movement of the sample container carriers on top of the transport plane by driving the electro-magnetic actuators (120, 125) such that the sample container carriers move along corresponding transport paths simultaneously and independently from one another, - the laboratory sample distribution system further comprises: - a sensor being adapted to measure supply currents (Id), wherein the electro-magnetic actuators (120, 125) are supplied with electrical energy based on the supply currents (Id) and supply voltages (Udc), and - a monitoring device functionally coupled to the sensor, wherein the monitoring device is adapted to monitor temperatures of the electro-magnetic actuators (120, 125) based on the measured supply currents (Id) and the supply voltages (Udc), wherein the supply voltages are known or measured by the sensor. - a sensor being adapted to measure supply currents (Id), wherein the electro-magnetic actuators (120, 125) are supplied with electrical energy based on the supply currents (Id) and supply voltages (Udc), and - a monitoring device functionally coupled to the sensor, wherein the monitoring device is adapted to monitor temperatures of the electro-magnetic actuators (120, 125) based on the measured supply currents (Id) and the supply voltages (Udc), wherein the supply voltages are known or measured by the sensor.