Systems, devices, and methods for analyte monitoring

A sensor carrier for use in an applicator for delivering a sensor control device, the sensor carrier comprising:

• a base having a first half and a second half;
• a first sensor retention arm coupled to the first half of the base at a first end portion of the first sensor retention arm and having a free second end portion extending toward the second half of the base, the first sensor retention arm including a first sensor retention feature on an inner surface of the first sensor retention arm and a first lock interface on an outer surface of the first sensor retention arm;
• a second sensor retention arm coupled to the first half of the base at a first end portion of the second sensor retention arm and having a free second end portion extending toward the second half of the base, the second sensor retention arm including a second sensor retention feature on an inner surface of the second sensor retention arm and a second lock interface on an outer surface of the second sensor retention arm;
• and
• three equally spaced housing attachment features extending upwardly from a top surface of the base, each housing attachment feature comprising:
• a housing snap;
• a housing locating feature;
• and
• a housing biasing feature.

An assembly, comprising:

• (1) an applicator for applying a sensor control device to a user, the applicator comprising:
• a housing;
• a sharp;
• a spring;
• and
• a sensor carrier coupled to the housing, the sensor carrier comprising:
• a base having a first half and a second half;
• a first sensor retention arm coupled to the first half of the base at a first end portion of the first sensor retention arm and having a free second end portion extending toward the second half of the base, the first sensor retention arm including a first sensor retention feature on an inner surface of the first sensor retention arm and a first lock interface on an outer surface of the first sensor retention arm;
• a second sensor retention arm coupled to the first half of the base at a first end portion of the second sensor retention arm and having a free second end portion extending toward the second half of the base, the second sensor retention arm including a second sensor retention feature on an inner surface of the second sensor retention arm and a second lock interface on an outer surface of the second sensor retention arm;
• and
• three equally spaced housing attachment features extending upwardly from a top surface of the base, each housing attachment feature comprising:
• a housing snap;
• a housing locating feature;
• and
• a housing biasing feature;
• and
• (2) the sensor control device, comprising:
• an in vivo glucose sensor, comprising:
• a proximal portion coupled with sensor electronics;
• and
• a distal portion configured to be positioned under a skin surface of the user and in contact with a bodily fluid;
• an electronics housing;
• and
• sensor electronics disposed within the electronics housing and coupled with the proximal portion of the in vivo glucose sensor, wherein the applicator is configured to advance the sensor carrier, the sensor control device, and the sharp from a proximal position entirely within the applicator to a distal position, wherein the spring is configured to automatically retract the sharp from the distal position to a retracted position entirely within the applicator.