‘Detecting’ a change in school-scanner policy

New NYPD figures may convince even Mayor de Blasio that metal detectors make schools safer.

De Blasio has announced that metal-detector placements would come under fresh scrutiny as part of an overall reform of campus disciplinary measures.

The mayor and Department of Education officials say they’ll use the latest school crime data to determine where detectors should be placed and how many are deployed.

The figures revealed that metal detectors found 37 of the 52 boxcutters that have been smuggled into schools.

Of 52 knives, 36 were detected by scanners. In addition, eight of 20 gun busts came after the weapons were detected by scanners, according to NYPD data.

Greg Floyd, the head of the school safety officers union, warned against any rollback of metal detectors for the sake of both staff and students.

“We’re putting kids’ lives at risk,” Floyd said. “We are putting politics above kids’ lives.”

The DOE stressed that the evaluation of detectors could result in new installations as well as removals.

In 2015, a panel convened by de Blasio recommended that the city create guidelines on removing some detectors, because many students see them as “intrusive and denigrating.’’