What type of detection equipment is NOT typically found at security checkpoints?

Scanning Electron Microscopes are highly specialized instruments used primarily in laboratories for analyzing the surfaces of materials and creating detailed images at the microscopic level. They operate under very specific conditions and are not practical for use in security checkpoints at airports or other public venues due to their complexity, cost, and the extensive time required for sample preparation and analysis.

In contrast, X-ray Equipment, Explosive Detection Dogs, and Body Scanners are all commonly employed in security screening processes. X-ray machines are used to inspect baggage and personal items, providing a quick visual representation of their contents. Explosive Detection Dogs are trained to sniff out explosives and are often deployed in areas where security is heightened. Body Scanners are used to screen passengers for concealed items, providing an efficient security measure without the need for physical pat-downs. The context and function of these devices align with the operational requirements of security checkpoints, making them vital tools in enhancing safety and security measures.