Hand-held (H150-E) and desktop (B220-HT) trace detection systems allow for accurate, real-time detection of explosives and drugs using advanced Ion Mobility Spectrometry (IMS). These systems require minimal maintenance with a non-radioactive ionization source, internal calibration system, and push-button maintenance. 

Learn more - https://www.leidos.com/markets/aviation/security-detection/aviation-checkpoint/explosive-trace-detection