Quadrupole resonance (QR) has been demonstrated to be an effective technique for detecting the presence of energetic materials hidden in baggage and cargo. Quantum Magnetics has developed a series of explosive detection devices (EDDs) based on QR technology. The QSCAN1000 can detect the presence of two main high-explosive molecules, RDX and PETN. These two materials are the main explosive constituents of many military plastic explosives. C4 and Semtex H contain RDX; Detasheet and Sentex A and H contain PETN.