An apparatus for the transmission of data obtained from a transcutaneous sensor, comprising: a sensor (101) that includes an electrical contact part and an insertion part, in which the insertion part is adapted for transcutaneous placement under a surface from the skin of a patient and to come into contact with a biological fluid under the surface of the skin； a support unit (302) that is configured to accommodate a part of the sensor and includes an adhesive layer provided on a support surface of the support unit, which is configured to be placed on the surface of the patient's skin, so that the adhesive layer be in contact with the skin surface and retain the support surface of the support unit in a substantially fixed position on the skin surface； and a data transmitter unit (102)； characterized in that the support unit (302) includes an electric power source (303), the data transmitter unit (102) is adapted to be mounted on the support unit and is further configured to establish electrical contact with the electrical contact part of the sensor (101) when mounted on the support unit； and the data transmitter unit (102) includes an electrical energy reserve (207) and is configured to be able to extract energy from both the power source (303) in the support unit and the electrical energy reserve.Un aparato para la transmisión de datos obtenidos de un sensor transcutáneo, que comprende: un sensor (101) que incluye una parte de contacto eléctrico y una parte de inserción, en el que la parte de inserción está adaptada para la colocación transcutánea bajo una superficie de la piel de un paciente y para entrar en contacto con un fluido biológico bajo la superficie de la piel； una unidad de soporte (302) que está configurada para alojar a una parte del sensor e incluye una capa adhesiva provista sobre una superficie de soporte de la unidad de soporte, que está configurada para colocarse sobre la superficie de la piel del paciente, de modo que la capa adhesiva esté en con
