Bio-scanner

Bio-scanners are pieces of Terran equipment built into installations. They may be accessed externally, though access codes are required, such codes being known only by high ranking personnel. With the right connections however, these protocols are easily overridden.

Bio-scanners appear to only be capable of registering Terran life signs as opposed to organisms as a whole. It appears that the scanners do not register the presence of organisms directly, but rather the recorded vitals of equipment personnel may be using.