The Criminal Justice Technology Testing and Evaluation Center (CJTTEC) conducted a performance evaluation of portable ferromagnetic metal detectors (FMDs) specifically designed to detect ferromagnetic materials, such as those commonly found in cellphones and other contraband items, within a correctional environment. Two FMD devices that are prevalent within the correctional industry were assessed at the Utah State Correctional Facility (USCF) in Salt Lake City.
The evaluation was divided into two distinct phases: (1) controlled performance testing, during which target items were concealed on different parts of the body and within objects, then repeatedly passed through the FMDs’ detection area; and (2) operational testing, in which USCF corrections officers used the FMDs in their daily operations over a 30-day period to assess various aspects of usability and performance. Key indicators evaluated included detection effectiveness for cellphones and small ferrous objects, accuracy in locating contraband on or within the body or objects, the prevalence of false-positive alerts, and overall device performance (e.g., setup time, alert zone accuracy, throughput, ease of use, battery life, durability, and portability).
Due to the sensitive nature of the findings related to correctional practices, CJTTEC is restricting the distribution of this report to corrections and law enforcement professionals. Individuals interested in accessing the document are encouraged to contact CJTTEC via email at CJTTEC@rti.org.
