A sensor cartridge comprising a sterile capsule. The sensor cartridge further comprises a sensor within the sterile capsule. The sensor cartridge further comprises a sensor connector connected to the sensor in an initial position. The sensor cartridge further comprises an insertion needle for inserting the sensor into a subject. The insertion needle is within the sterile capsule. The sensor cartridge further comprises a sensor mounting unit for receiving the sensor connector at a mounted position. The sensor mounting unit comprises an adhesive surface for attaching to an exterior surface of the subject. The sensor cartridge further comprises an insertion mechanism operable for actuating the insertion needle and moving the sensor connector from the initial position to the mounted position.