Abstract: Device for surface sampling, comprising: a flat material layer comprising a surface portion and a circumferential edge portion defining the boundary of the surface portion, further comprising a sampling volume, wherein the sampling volume is adapted to comprise a filler device for filling out the sampling volume, a protective layer arranged on the surface portion of the material layer by an adhesive arranged on the material layer, wherein a portion of the protective layer extends beyond the boundary of the surface portion for facilitating a removal of the protective layer from the material layer.

Abstract: Device (1) for surface sampling, comprising: a material layer (2) comprising a surface portion (2c) and a circumferential edge portion (2d) defining the boundary of the surface portion (2c), further comprising a sampling volume (2a), wherein the sampling volume (2a) is adapted to comprise a filler device (2b) for filling out the sampling volume (2a), a protective layer (3) arranged on the surface portion (2c) of the material layer (2) by an adhesive (4) arranged on the surface portion (2c) of the material layer (2), wherein the device (1) further comprises a removal device (12), wherein the removal device (12) is fixedly arranged to the material layer (2), wherein the removal device (12) further comprising a removal surface portion (12a), wherein the removal surface portion (12a) is adapted to provide a lower adhesion against a surface compared to the adhesive (4), wherein the removal surface portion (12a) is facing essentially the same direction as the surface portion (2c).

Abstract: A heating device (1) comprising: an energy well (2), a heat pump (3) which is adapted to take up and transfer heat from the energy well (2) by the aid of a line from the energy well to the heat pump (3) for transport of anti-freeze liquid, a heat extraction device (4) connected to a heat pump (3) which selectively can be brought into a connected and a disconnected position, thaw coils (5) for thawing ground surrounding the thaw coils (5), in which the anti-freeze liquid is transportable, which thaw coils (5) selectively can be connected and disconnected to the line from the energy well to the heat pump (3), a heat exchanger (7) connected to the heat extraction device (4) adapted to selectively transfer heat to the thaw coils (5) by the aid of the heat extraction device (4), a control system (6) which is adapted for controlling the heating device (1) whereby low temperature heat from the energy well (2) alternatively high temperature heat from the heat pump (3) and the heat extraction device (4) selectively ca