Paul Richard Draper,Anthony Paul Morris,Stephen Francis Gilmore
申请号：
US16727003
公开号：
US20200155762A1
申请日:
2019.12.26
申请国别(地区):
US
年份:
2020
代理人:
摘要：
The invention relates to an arrangement for detecting a position of a plunger (4) relative to a bung (3) in a drug cartridge (1), comprising a proximity sensor (5) located close to a distal end (6) of the plunger (4) facing the bung (3) and aligned to receive light reflected by the bung (3).
