A detection device for detecting a physical quantity comprising: a detector for detecting a physical quantity, wherein the detector is designed to output data, which represent the physical quantity; a memory, in which a communication profile of the detection device is stored, wherein the communication profile defines at least one predefined transmission time for sending the data, wherein the predefined transmission time is assigned to the detection device; and a timer for providing a time signal, wherein the time signal indicates a time difference between a current point in time and a predefined reference point in time, wherein the timer comprises a time signal receiver, which is designed to provide a time synchronisation signal, wherein the timer is designed to change the time signal on the basis of the provided time synchronisation signal; and a communication interface, which is designed to send the data at the predetermined transmission time over a communication network to a predefined target network address, wherein the communication interface is designed to determine the predefined transmission time for sending the data on the basis of the time signal; wherein the communication interface is designed to receive a broadcast signal from a server entity over the communication network, wherein the broadcast signal comprises a further communication profile, wherein the further communication profile is assigned to the detection device, and wherein the communication interface is designed to change the communication profile on the basis of the further communication profile, wherein the detection device is assigned to a group of detection devices, wherein the group of detection devices is locally distanced from a further group of detection devices, wherein the communication profile of the detection device is the same as the communication profile of a detection device of the further group of detection devices. a detector for detecting a physical quantity, wherein the detector is designed to output data, which represent the physical quantity; a memory, in which a communication profile of the detection device is stored, wherein the communication profile defines at least one predefined transmission time for sending the data, wherein the predefined transmission time is assigned to the detection device; and a timer for providing a time signal, wherein the time signal indicates a time difference between a current point in time and a predefined reference point in time, wherein the timer comprises a time signal receiver, which is designed to provide a time synchronisation signal, wherein the timer is designed to change the time signal on the basis of the provided time synchronisation signal; and a communication interface, which is designed to send the data at the predetermined transmission time over a communication network to a predefined target network address, wherein the communication interface is designed to determine the predefined transmission time for sending the data on the basis of the time signal; wherein the communication interface is designed to receive a broadcast signal from a server entity over the communication network, wherein the broadcast signal comprises a further communication profile, wherein the further communication profile is assigned to the detection device, and wherein the communication interface is designed to change the communication profile on the basis of the further communication profile, wherein the detection device is assigned to a group of detection devices, wherein the group of detection devices is locally distanced from a further group of detection devices, wherein the communication profile of the detection device is the same as the communication profile of a detection device of the further group of detection devices.