Goring Kerr Metal Detector. Model Tek 21 5*14, S/N 21590. Sensitivity tested with test strips as 1.0 mm ferrous metals, 1.5 non-ferrous metals, and 2.5 mm non-magnetic stainless steel. Actual numbers may vary depending on local site conditions, product tested, and other factors. Maximum aperture/clearance above belt: 14 in. W x 4 in. H. 460 V, 3 phase. With 96 in. conveyor. Overall dimensions: 110 in. L x 28 in. W x 53 in. H.