Abstract: Apparatus and techniques for detecting unknown chemical compounds in the field are provided. A Digital Signal Processor (DSP) includes a database of chemical signatures and corresponding chemicals. An air sample is analyzed in the field and chemical signature of any chemicals present is determined. This chemical signature is then correlated with the chemicals in the database. If a match is found, the operator is alerted to the fact. If no match is found, the operator is alerted to the fact that an unknown chemical compound is found but no correlation could be found. A corresponding system and method are provided.

Abstract: Apparatus and techniques are provided for screening personnel at secured installations like airports, courthouses, police stations, secured administrative buildings, military installations and other installations requiring heightened security. The apparatus and the system integrate state of the art available technologies in biometric identification, metal detection, document identification, and body scan apparatus. All technologies are integrated to provide reliable, efficient and economic solution to security problems. A corresponding method of screening is provided.