A bio-scanner was technology used to detect and scan biological entities. Bio-scanners were found in devices such as tricorders as well as starships themselves. The summary of the findings made by bioscanners were reported in a bioscanners report.

Earth Starfleet ships were equipped with bio-scanners since at least the mid-22nd century, though the technology was not perfect. In 2152, the bio-scanners aboard Enterprise NX-01 failed to detect a lymphatic virus brought on board along with canisters of deuterium. (ENT: "The Seventh")

24th century Starfleet tricorders were equipped with bio-scanners. In 2371, Neelix's tricorder picked up a single class 3 humanoid organism on a rogue planetoid that was thought to be uninhabited. (VOY: "Phage") Later that same year, the USS Voyager used its own bio-scanners to investigate new space-dwelling lifeforms discovered in the Delta Quadrant. (VOY: "Elogium")

The Nechani race had bio-scanners, and used them to detect a subdermal bioprobe implanted in Captain Kathryn Janeway during her visit to their homeworld. (VOY: "Sacred Ground")

The Nyrian biosphere vessel was equipped with bio-scanners, which Captain Janeway and Tuvok used to help locate other Voyager crewmembers that were being held captive. (VOY: "Displaced")

According to the script for TNG: "A Matter of Time", a "bioscanner" was one of the devices that time traveler Berlinghoff Rasmussen had stolen while on board the USS Enterprise-D, indicating that Federation bio-scanners may have existed as stand-alone devices, and not necessarily only as a function found in tricorders and starships.

Other references

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