Hand-held device comprised of chemical and heat sensors for the detection of explosives

spray analysis and characterization equipment, namely, hardware components for actuating the pumping mechanism of a pump-based spray device so as to produce an aerosol spray plume consisting of liquid or non-liquid particulate material, laser and image acquisition devices for illuminating and imaging an aerosol spray plume, and computer hardware and software for processing the image data associated with an aerosol spray plume