Abstract: Disclosed is a detector device with a cooling system having first cooling means (20,30) for providing a first cooling temperature, said first cooling means comprising a two-stage pulse tube cooler system, in which a first pulse tube cooler (20) pre-cools a second pulse tube cooler (30), and second cooling means (82,83,85,86,87) for providing a second cooling temperature, which is lower than the first cooling temperature, said second cooling means being pre-cooled by said first cooling means. Furthermore, the detector device comprises detector means (60) for detecting particles, radiation or fields with a sensor based on a low temperature effect, said detector means being thermally coupled to said second cooling means. Thus, a detector device is provided with a comparably simply structured cooling system whereby sensors can be operated which have a good energy resolution and which can be quasi anywhere on account of the low complexity of the cooling system. (FIG.