Accessibility StatementSkip Navigation The B220-HT is a desktop ETD system that uses advanced analysis technology to deliver rapid, simultaneous detection of a broad range of explosives and narcotics, using trace samples collected from objects or skin, making it well-suited for high-throughput airport environments. It is part of Leidos' broader family of trace detection systems, including the TSA-certified QS-B220, which is widely deployed across U.S. airports nationwide. Leidos capabilities deployed across ...