Recording device for the reliable recording of the continuous course of the air temperature
A thermograph (from ancient Greek: θερμός thermós "warm, hot" and γράφειν gráphein "to write") is a measuring device for detecting and recording temperature in a continuous, temporal course. It is therefore a recording thermometer that controls a writing arm via its specific input measuring method. This in turn has a writing attachment at its tip, with which it transfers the course of the temperature to a rotating paper drum and thus displays it graphically. The time span of the recording is determined by the rotation speed of the paper drum.