An assembly for delivery of an analyte sensor comprising: a sensor control device including: an electronics housing comprising: a shell having an upper surface with a first aperture defined therein, a mount mated to the shell and having a second aperture aligned with the first aperture; a collar positioned in the electronics housing, wherein the collar comprises a central aperture axially aligned with the first aperture of the mount and the second aperture of the mount; a first seal element received within the central aperture of the collar; a circuit board disposed within the electronics housing and comprising a plurality of electronics modules; an analyte sensor having a proximal portion and a distal portion, wherein the proximal portion is electrically coupled with the circuit board, and wherein the distal portion extends from a portion of the electronics housing and is configured to extend beneath a user's skin to sense an analyte level in a bodily fluid; an adhesive patch attached to an underside of the electronics housing and configured to secure the sensor control device on a user's skin; a sharp hub including a sharp, the sharp hub configured to sealingly engage the first seal element; a second seal element positioned on the bottom of the mount proximate the second aperture of the mount; a sensor cap having a first end, a second end, and an inner chamber, wherein the first end is removably coupled to the sharp hub and is configured to sealingly engage the second seal element, wherein the second end comprises an engagement feature, and wherein the inner chamber receives at least a portion of the distal portion of the analyte sensor. a sensor control device including: an electronics housing comprising: a shell having an upper surface with a first aperture defined therein, a mount mated to the shell and having a second aperture aligned with the first aperture; a collar positioned in the electronics housing, wherein the collar comprises a central aperture axially aligned with the first aperture of the mount and the second aperture of the mount; a first seal element received within the central aperture of the collar; a circuit board disposed within the electronics housing and comprising a plurality of electronics modules; an analyte sensor having a proximal portion and a distal portion, an electronics housing comprising: a shell having an upper surface with a first aperture defined therein, a mount mated to the shell and having a second aperture aligned with the first aperture; a shell having an upper surface with a first aperture defined therein, a mount mated to the shell and having a second aperture aligned with the first aperture; a collar positioned in the electronics housing, wherein the collar comprises a central aperture axially aligned with the first aperture of the mount and the second aperture of the mount; a first seal element received within the central aperture of the collar; a circuit board disposed within the electronics housing and comprising a plurality of electronics modules; an analyte sensor having a proximal portion and a distal portion, wherein the proximal portion is electrically coupled with the circuit board, and wherein the distal portion extends from a portion of the electronics housing and is configured to extend beneath a user's skin to sense an analyte level in a bodily fluid; an adhesive patch attached to an underside of the electronics housing and configured to secure the sensor control device on a user's skin; a sharp hub including a sharp, the sharp hub configured to sealingly engage the first seal element; a second seal element positioned on the bottom of the mount proximate the second aperture of the mount; a sensor cap having a first end, a second end, and an inner chamber, wherein the first end is removably coupled to the sharp hub and is configured to sealingly engage the second seal element, wherein the second end comprises an engagement feature, and wherein the inner chamber receives at least a portion of the distal portion of the analyte sensor. an adhesive patch attached to an underside of the electronics housing and configured to secure the sensor control device on a user's skin; a sharp hub including a sharp, the sharp hub configured to sealingly engage the first seal element; a second seal element positioned on the bottom of the mount proximate the second aperture of the mount; a sensor cap having a first end, a second end, and an inner chamber, wherein the first end is removably coupled to the sharp hub and is configured to sealingly engage the second seal element, wherein the second end comprises an engagement feature, and wherein the inner chamber receives at least a portion of the distal portion of the analyte sensor.