A measuring system for determining and monitoring measured values for specific physical quantities, comprising an internet platform for storing and evaluating measured values, which is connected to at least one measuring device by means of remote data transmission, the at least one measuring device comprising: a main measuring probe, configured to determine main measured values of a specific physical measured variable at specific first time intervals according to a first measuring principle, a control measuring probe, set up to determine control measured values of the specific physical measured variable at specific second time intervals according to a second measuring principle, and a remote data transmission module for transmitting the measured values determined by the two measuring probes to the internet platform, characterized in that the at least one measuring device includes a processing device that compares the measured values from the two measuring probes (4-1, 4-2) and generates an alarm or monitoring signal if the two measured values are not within a preset tolerance range, and that the first time intervals between the measurements of the main measuring probe are smaller than the second time intervals between the measurements of the control measuring probe. an internet platform for storing and evaluating measured values, which is connected to at least one measuring device by means of remote data transmission, the at least one measuring device comprising: a main measuring probe, configured to determine main measured values of a specific physical measured variable at specific first time intervals according to a first measuring principle, a control measuring probe, set up to determine control measured values of the specific physical measured variable at specific second time intervals according to a second measuring principle, and a remote data transmission module for transmitting the measured values determined by the two measuring probes to the internet platform, characterized in that the at least one measuring device includes a processing device that compares the measured values from the two measuring probes (4-1, 4-2) and generates an alarm or monitoring signal if the two measured values are not within a preset tolerance range, and that the first time intervals between the measurements of the main measuring probe are smaller than the second time intervals between the measurements of the control measuring probe. a main measuring probe, configured to determine main measured values of a specific physical measured variable at specific first time intervals according to a first measuring principle, a control measuring probe, set up to determine control measured values of the specific physical measured variable at specific second time intervals according to a second measuring principle, and a remote data transmission module for transmitting the measured values determined by the two measuring probes to the internet platform, characterized in that the at least one measuring device includes a processing device that compares the measured values from the two measuring probes (4-1, 4-2) and generates an alarm or monitoring signal if the two measured values are not within a preset tolerance range, and that the first time intervals between the measurements of the main measuring probe are smaller than the second time intervals between the measurements of the control measuring probe.