A system for installing a sensor in a body, the system comprising: a puncture device for puncturing a skin of a body comprising: a casing defining a cavity ; an elongated member projecting from the casing and comprising a sharp end for puncturing the skin; and a sensor assembly for measuring and collecting data about the body, the sensor assembly comprising: a sensing unit comprising a sensor body and a sensor contained in the sensor body, the sensor for measuring the data and the sensor body being engageable with the elongated member; a data collecting unit for collecting and storing the data, the data collecting unit being receivable within the cavity of the casing; and a communication cable extending between the sensing unit and the data collecting unit for transmitting the data measured by the sensor to the data collecting unit; wherein the sensor assembly is removably securable to the puncture device by inserting the data collecting unit in the cavity of the casing and engaging together the sensing unit and the elongated member, and wherein the communication cable is tensed when the sensor assembly is removably secured to the puncture device wherein the puncture device further comprises an anchoring pin projecting therefrom and the sensor body is provided with an anchoring recess for receiving the anchoring pin, the sensing unit and the elongated member being engageable together by inserting the anchoring pin into the anchoring recess. a casing defining a cavity ; an elongated member projecting from the casing and comprising a sharp end for puncturing the skin; and a sensor assembly for measuring and collecting data about the body, the sensor assembly comprising: a sensing unit comprising a sensor body and a sensor contained in the sensor body, the sensor for measuring the data and the sensor body being engageable with the elongated member; a data collecting unit for collecting and storing the data, the data collecting unit being receivable within the cavity of the casing; and a communication cable extending between the sensing unit and the data collecting unit for transmitting the data measured by the sensor to the data collecting unit; a sensing unit comprising a sensor body and a sensor contained in the sensor body, the sensor for measuring the data and the sensor body being engageable with the elongated member; a data collecting unit for collecting and storing the data, the data collecting unit being receivable within the cavity of the casing; and a communication cable extending between the sensing unit and the data collecting unit for transmitting the data measured by the sensor to the data collecting unit; wherein the sensor assembly is removably securable to the puncture device by inserting the data collecting unit in the cavity of the casing and engaging together the sensing unit and the elongated member, and wherein the communication cable is tensed when the sensor assembly is removably secured to the puncture device wherein the puncture device further comprises an anchoring pin projecting therefrom and the sensor body is provided with an anchoring recess for receiving the anchoring pin, the sensing unit and the elongated member being engageable together by inserting the anchoring pin into the anchoring recess. <EOS>