SENSOR FOR A DRUG DELIVERY DEVICE

摘要

In one aspect the present invention relates to a sensor for measuring at least one physical or chemical parameter of a cartridge (10) filled with a liquid substance. In a further aspect the invention relates to a drug delivery device (1, 2, 3) equipped with such a sensor, wherein the sensor comprises: a planar flexible foil (11) having a first section (13, 23) and having a second section (15, 25) separated from the first section (13, 23), at least one measurement electrode (32, 34) located on the flexible foil (11), wherein the flexible foil (11) is wrappable into a wrapped configuration (W) in which the foil (11) forms at least a first wrap (22, 24, 26) with an inner diameter (D) that is equal to or larger than an outer diameter of the cartridge (50), wherein in the wrapped configuration (W) the first section (13, 23) and the second section (15; 25) at least partially overlap, at least one fastener (33, 36) located in one of the first and second section (13, 23, 15, 25) and configured to attach to the other one of the first and second sections (13, 23, 15, 25) for keeping the flexible foil (11) in the wrapped configuration (W).