metal detectors

discrimination

Unjust differential treatment

• sensitivityResponsiveness to stimuli
• pinpointingLocating with precision
• thresholdPoint of beginning

VLF · ferrous · non-ferrous · iron mask · frequency · sweep · headphones · shaft · armrest · display

electromagnetic

Involving electric and magnetic fields

• inductionFormal admission process
• frequencyRate of recurrence
• conductivityAbility to carry current

signal processing · magnetometer · phase shift · pulse · transmitter · receiver · circuitry · microprocessor · mineralization · saltwater

gold

Element seventy-nine

• nuggetsSmall solid lumps
• treasure huntingSearching for hidden valuables
• silverLustrous white precious metal

coins · jewelry · panning · prospectors · finds · beach · mineralogy · ore · gems · cache

airport

Aviation passenger facility

• checkpointInspection station on route
• screeningEvaluative selection process
• weaponsTools for fighting

contraband · wand · handheld · walkthrough · baggage · guard · scan · alarm · courthouse · stadium

artifacts

Human-made historical objects

• relicsPreserved items from antiquity
• coinsMetal money units
• excavationAct of unearthing

digging · site · burial · tombs · treasure · pottery · jewelry · ancient · ruins · stratigraphy

• security measuresbag checks, security guards, checkpoints, surveillance cameras, x-ray machines
• travel securityairport security, passport control, baggage screening, TSA, body scanners
• Security Serviceslock replacement, camera repair, access control, window locks, motion sensors
• safetysafety helmet, hazard, airbag, alert, occupational safety
• securitysecurity guard, security cameras, alarm system, security system, lock
• airport securityTSA, TSA agent, security, security checkpoint, screening