Temperature-control device having a reaction vessel

Temperature-control device for receiving a reaction vessel with a heat-insulated interior space which is covered by a lid, said reaction vessel comprising a hollow body having a cap, said hollow body being symmetrical with respect to an axis of symmetry and closed on one side by a base, a heatable heating block being provided in said reaction vessel interior space, said heating block having an inner surface which is adapted to the base of the reaction vessel and contacts the latter in order to heat a sample located in the reaction vessel, said lid being formed by a heat-conducting material, is covered by a heat-insulating cover and contacts said cap, a heatable heating body which encloses the hollow body, is adapted to the shape of the hollow body and communicates with the lid via a heat-conducting contact region so that the heating body heats the hollow body directly and heats the cap indirectly via the lid, and said lid having a hole through which a hollow needle can be inserted through the cap into the hollow body.