1999 Safeline Metal Detector. Model: PPH/20X12/SS/25-100/HD/RC. S/N: 33976. Ref. No. 13831-01. Module S/N: 59331. Hardware version: V3c. Firmware version: XT1-02. Maximum aperture/clearance: 1 ft. 7 in. W x 10-3/4 in. H. Infeed/exit height: 3 ft. Sensitivity ratings at 100 KHz are listed as: 2.2 mm ferrous, 2.7 mm non-ferrous, and 3.2 mm stainless steel. Sensitivity ratings at 25 KHz are listed as: 3.0mm ferrous, 3.5 mm non-ferrous and 5.8 mm stainless steel. Temperature ranges of operation: 14°F minimum to 110°F maximum. Overall dimensions: 5 ft. 1 in. L x 3 ft. 3 in. W x 4 ft. 5 in. H.(ACN216a).