MK-7 scanner
From Memory Alpha, the free Star Trek reference
An MK-7 scanner is a Cardassian security device used to verify identity. The MK-12 scanner is a more advanced device than the MK-7.
When Vash visited Deep Space 9 upon her return from the Gamma Quadrant, she initially thought the security device in use in the assay office was an MK-7 scanner. (DS9: "Q-Less")
