Abstract: A method for factory calibration of a sensor of a CGM system is disclosed. A processor receives an enzyme membrane thickness after each dip of a working wire according to first parameters. The processor receives a glucose limiting membrane thickness after each dip of the working wire according to second parameters. The processor determines a working wire diameter, and includes the membrane thicknesses. The processor in communication with the CGM system, automatically generates a correlation between the first and the second parameters to at least one of a factory sensitivity and a drift profile. The drift profile predicts a sensitivity of the sensor over time. The processor associates the at least one of the factory sensitivity or the drift profile with the sensor. The sensor outputs a glucose reading during in-vivo use based on the at least one of the factory sensitivity or the drift profile.

Abstract: An apparatus for coating a working wire of a sensor includes a carousel, a robotic arm, and an optical scanner. The carousel includes a first platform, a second platform, and a ring dipping tool. The first platform has a central axis and supports a plurality of stations, all arranged around the central axis. The second platform is positioned above the first platform, with a platform actuator that raises, lowers, and rotates the second platform. The ring dipping tool is coupled to an edge of the second platform and oriented vertically with respect to ground and extending toward the first platform. The robotic arm is configured to transport a fixture, the fixture being configured to hold the wire. The optical scanner is positioned near a wire dipping station of the plurality of stations and configured to scan a position of the wire and a location of the ring dipping tool.