Spectrum Guard Desktop Explosive & Narcotic Detector MS-100 is the first miniatured mass spectrometry trace detector targeted for explosives, narcotics and TICs detection. Based on mass spectrometry technology, Spectrum Guard MS-100 is of extremely high accuracy and nearly zero false positive. It also features the most comprehensive material library of explosives and narcotics as many as hundreds of kinds, including varied explosives of homemade, commercial, military use, drugs, precursor chemicals and new psychoactive substances (NPS).