Abstract: The present invention relates to a body monitoring system comprising a patch, the patch comprising a main body, the main body comprising a second face suitable for facing the skin of a user, the patch comprising an adhesive layer at least partially covering the second face, and a peelable cover covering the adhesive layer, the peelable cover comprising at least two separate portions, the portions being adjacent to each other, the main body and the adhesive layer comprise a central portion forming an opening suitable for receiving the capsule, the opening having a maximum diameter greater than 2 mm, preferably greater than 5 mm.

Abstract: The present invention relates to a sensor preparation assembly (30) for a body monitoring system, the sensor (30) comprising at least one needle, the preparation assembly comprising: a bag (26) comprising a volume of a preparation solution, the bag (26) being configured to be positioned under the sensor (30) and being configured to be pierced by the needle (32), a receptacle (28) on which the bag is arranged (26), bearing means (24) that arc movable in relation to the receptacle (28) toward a bearing position, the bearing means (24) in the bearing position being configured to cause the sensor (30) to pierce the bag (26). The invention further relates to a sensor preparation method, comprising the placement of the sensor (30) in a position that is interposed between the bearing means (24) and the bag (26), the needle (32) of the sensor (30) piercing the bag (26).