FIELD: measuring equipment.SUBSTANCE: invention relates to spectrometry basing on an analysis of the mobility of ions and can be used for identifying substances. Sampling probe for an ion mobility spectrometry device comprises a housing having an inlet intended for the introduction of a fluid, for example an air flow, from the environment. Inlet closing assembly also comprises a sealing element, which limits the inlet passage being in fluid communication with the inlet limited by the housing. Inlet closing assembly also includes a spool that is adapted to abut against the sealing element. Spool is designed able to block the inlet passage in the abut position. Inlet closing assembly also includes a drive element configured able to move the spool to an adjacent engagement with the sealing element and from the adjacent engagement with the sealing element. Inlet closing assembly also comprises a holding element for holding the spool in the adjacent engagement with the sealing element when the spool is positioned
