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Explosive Detector C04 is designed to detect explosive vapors when examining various objects (personal belongings, baggage, mail, parcels, vehicles, premises, etc.), as well in search for trace amounts of explosive substances using a piezoelectric desorption chamber.

Operation of the device is based on nonlinear dependence of ion mobility in an electric field on the density of the latter. The air entering the analysis and the calibrating reference channels of the device is ionized by the integrated ionizing radiation source. The formed ions are separated by high-frequency alternating and constant electric fields.

This separation is a result of different dependence of the mobility of ions on the density of the electric field.  At a certain type of superposition of alternating and constant electric fields for each type of ions, the average ion drift is compensated, which creates conditions for passage of a certain type of ions through the analysis slot.  Ions fall on the electrometric amplifier, and thus their selection is carried out.

Simulation explosive vapors are constantly added to the air entering the reference channel during the operation of the device.