Abstract The invention relates to a sensor device (1) for the 5 detection of ambient conditions, specifically for agricultural applications, having at least one environmental sensor (2), specifically a temperature sensor, a humidity sensor or a pollutant sensor, having a controllable ventilation apparatus (10) which is 10 assigned to the environmental sensor (2) in order, as required, to ventilate the latter with ambient air, and having analysing electronics (5), which are at least connected to the environmental sensor (2) for signalling purposes. At least one energy conversion 15 apparatus (7) is provided, which converts radiation energy into electrical energy and is connected/connectable to the electrically operable ventilation apparatus (10). 20 (Figure) Fig. 1 5 -16 13- 14
