US Patent 10987472 Dose detection for a medication delivery device

The present disclosure relates to a dose detection system for use in combination with a medication delivery device. In one aspect, the system includes a module body adapted to be removably attached to the actuator of a medication delivery device, and a plurality of magnetic sensing elements attached to said module body. The magnetic sensing elements can be spaced apart from one another to define a ring pattern. The system detects the amount of rotation of a magnetic ring of said one or more dipoles of a medication delivery device relative to the magnetic sensing elements during dose delivery when the module is attached to the device.