KEY WORDS: drug detection, ion scanner, ion mobility spectrometer, prison What we looked at successfully identified many of the drugs of concern for CSC and were linked with a reduction in the introduction of Under current Correctional Service Canada (CSC) policy, drugs in institutions after implementation of the technology Ion Mobility Spectrometry (IMS) devices (also referred to (Hogsten, 1998, [...] Furthermore, one study ion scanners) may be employed as a non-intrusive search found that significant reductions in drug-related offender tool for inmates, staff and visitors, as well as for incoming misconduct following the placement of an IMS unit in the mail and parcels. [...] The current review examines the use of lobbies of two correctional institutions, (86% and 58%, IMS devices internationally, discusses their benefits and respectively); larger reductions than were found in other limitations and examines existing research. [...] What we found What it means An IMS unit is a type of trace detecting device that Overall, this review indicates that IMS units are useful in measures the deflection of particles after they are exposed detecting most drugs. [...] The speed at which the particles move oversensitive and are limited in their ability to detect certain helps to determine the substance of origin.