Datenrecorder

The data recorder has at least one sensor unit for determining at least one parameter to be recorded during a monitoring period. A control unit, preferably a microprocessor, controls the detecting and recording. A timer prepares a reference time, on the basis of which the actual measuring time can be determined. A storage unit is provided for storing the determined parameters and preferably also stores the reference time prepared for each measuring value by the timer. A battery unit supplies power, and a fixing unit is provided to secure the data recorder at an article to be monitored. An interrupting unit interrupts the measuring operation, as soon as the fixing unit is manipulated. USE - Also for measuring humidity, air pressure, sound levels, radioactivity or chemical or biological substances. ADVANTAGE - Data recorder is substantially protected against manipulation.