Smiths Detection, a division of Smiths Group plc, is a global leader in threat detection and security screening technologies, providing advanced detection solutions for explosives, weapons, contraband, and hazardous substances to protect people, assets, and infrastructure. Its products include sensors and screening equipment used in aviation, ports, borders, and critical infrastructure. The business operates from Hemel Hempstead, UK, and is part of Smiths Group's engineering portfolio, which is undergoing strategic divestitures as of 2025.