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Bottled Liquid Scanners

Innovation & Technology

Photo of a TSO using a FIDO XT

Bottled liquids scanner (BLS) screening systems are screening technologies that are used by Transportation Security Officers to detect potential liquid or gel threats which may be contained in passenger's property. differentiate liquid explosives from common, benign liquids. TSA utilizes this technology at checkpoints across the country, where it is used primarily to screen medically necessary liquids in quantities larger than three ounces.

Next generation bottled liquids scanner systems have the ability to detect a wider range of explosive materials and use light waves to screen sealed containers for explosive liquids. TSA recently deployed 500 next generation BLS units to airports nationwide. is currently testing new liquid screening systems with enhanced detection capabilities and use light waves to screen sealed containers for explosive liquids.

Following the disruption of the UK/US airline bombing plot in August 2006, TSA issued new rules that, with a few exceptions, effectively banned liquids, gels, and aerosols on aircraft. After conducting extensive research, TSA determined small amounts of liquids are not a threat. On September 26, 2006, TSA permitted small amounts of liquids, gels and aerosols in travel size containers, and exempted baby formula/milk/juices, medicines, and other medically-required liquids.