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HIDDEN OBJECTS - SEARCH AT TWO SAND QUARRIES

NCJ Number
10297
Journal
Police Research Bulletin Issue: 8 Dated: (OCTOBER 1968) Pages: 20-24
Author(s)
B J BLAIN
Date Published
1968
Length
5 pages
Annotation
AN ACCOUNT OF ATTEMPTS TO EMPLOY METAL DETECTORS IN LOCATING STOLEN EARTH-MOVING EQUIPMENT THOUGHT TO HAVE BEEN SECRETED IN TWO SAND QUARRIES.
Abstract
THREE MEMBERS OF THE POLICE RESEARCH AND DEVELOPMENT BRANCH'S EQUIPMENT SECTION WERE CALLED IN TO CONDUCT THE SEARCH. THREE INSTRUMENTS WERE USED - A GOLDAK 'COMMANDER' MUTUAL INDUCTANCE METAL DETECTOR, A WARDLE AND DAVENPORT PROTON MAGNETOMETER, AND A PLESSEY FLUXGATE GRADIOMETER. ALTHOUGH FULL DIGGING WAS NEVER CARRIED OUT, THE USE OF THE ABOVE NAMED EQUIPMENT PROVED ENTIRELY SUCCESSFUL FROM A TECHNICAL VIEWPOINT OF ACCURACY IN DETECTING FERROUS OBJECTS.