#$%^&*AU2014203806B220160414.pdf#####-17Abstract In one aspect, there is provided a sensor for detecting a level of a liquid in a vessel, the level of the liquid moving between a filled condition and a dry condition, the sensor including: a body including a receptacle； a first opening arranged to allow fluid communication between the receptacle and the liquid contained in the vessel； a second opening arranged to allow fluid communication between the receptacle and the external environment； and wherein the second opening is adapted to be selectively movable between an open state in the dry condition, and a closed state in the filled condition； and wherein in the dry condition, the second opening is in the open state so as to allow the liquid to enter receptacle via the first opening and displace gas within the receptacle via the second opening； and wherein in the filled condition, the second opening moves to the closed state such that the receptacle provides a seal between the second opening and the liquid within the receptacle.1/5 20 42 16 40 10 36 26 30 12 HW 34 28 27 24 25 10 16 4 Figure 1 26 29 35 36 48 26 23 39 52 28 244 33 - - 44 39 52 50 36 24 25 46 Figure 2 Figure 3
