A suitcase-borne stealth stoichimetric explosive detection device, the SIEMS 3E3 uses a fiber optic connection to a remote notebook computer and employs HiEnergy's analytics and graphical user interface. Including the power supply, the system weight about 140 pounds and is contained within an unmarked aluminum suitcase with wheels. The 3E3's mobility offersadvantages for the detction of suspicious objects that are inaccessible by vehicle-borne systems.