Abstract <p>The main analytical and operational characteristics of stationary (laboratory) and portable (handheld) mass spectrometers and ion mobility spectrometers for detecting traces and vapors of explosives were compared. The limit of detection, the setting time (speed of response), the (linear) range of detectable substance content in samples, the resolution, and the cost of the specified instruments were considered. The requirements for the performance and reliability of detection, maintenance, and the qualifications of service and maintenance personnel were discussed. Promising areas for further improvement of these instruments were listed.</p>