A connecting line is provided for removing water entering an air filter housing, between the air filter housing and a cooling unit. The preferred sensor means 40 includes a pair of closely spaced electrically conductive rollers 41, 42, a power source connected to one of the other rollers 41 or 42. catheter assembly and needle safety device are disclosed which allow for the safe removal of a needle from a catheter assembly. The issue addressed by this invention occurs when the primary user is not available to enter the password or pass phrase.