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 being stationary arranged below the transport plane , the electro-magnetic actuators 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 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 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 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 being stationary arranged below the transport plane , the electro-magnetic actuators 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 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 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 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 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 based on the measured supply currents (Id) and the supply voltages (Udc), wherein the supply voltages are known or measured by the sensor . <EOS>