Abstract: A replaceable cap (10) for a transdermal liquid dosing device (12) such as an insulin pen is provided. The cap includes an elongate hollow body (14) with a first open end (16) which can be placed over a front part (26) of the dosing device and a second closed end (18) opposite the first end. The cap body also includes a cavity which opens into the interior (50) of the cap body and which houses a control unit (52) which includes a timer unit, a switch mechanism (56) that stands at least partially proud of the cavity, so as to project into the interior of the body, and a timer display unit (58) which displays time counted by the timer unit on an outer surface of the body of the cap.

Abstract: A replaceable cap (10) for a transdermal liquid dosing device) such as an insulin pen is provided. The cap includes an elongate hollow body (14) with a first open end (16) which can be placed over a front part (26) of the dosing device and a second closed end (18) opposite the first end. The cap body also includes a cavity which opens into the interior (50) of the cap body and which houses a control unit (52) which includes a timer unit, a switch mechanism (56) that stands at least partially proud of the cavity so as to project into the interior of the body, and a timer display unit (58) which displays time counted by the timer unit on an outer surface of the body of the cap.