A contact probe assembly may include a cylindrical member including a barrel having a first opening located at a first end of the barrel and a second opening located at a second end of the barrel. The contact probe assembly may also have a plunger having a first end and second end. The first end of the plunger may be adapted to be removably received by the second opening of the barrel. The contact probe assembly may also include a cap having at least one o-ring. The cap may be configured to interconnect with the second end of the barrel such that the o-ring seals a gap between the plunger and the barrel. The contact probe assembly may have a plug that may be adapted to be removably received by the first opening of the barrel. The plug may be configured to seal the first opening.