Minelab
E-trac
Garrett
Standard
IN AIR           UNDERGROUND
All metal
All metal
Disc
Standard
GTI2500
18"
15"
13.5"
IN AIR           UNDERGROUND
12
9.5
8.5
3
2
1.5
12
9.5
8.5
16
12.5
11
14
11.5
10.5
11
9
8.5
7
5
4
10.5
8
7
7.5
5.5
4.5
10.5
8
6.5
13.5
11
10.5
13
10.5
10
15
12
11
15
13
12
Detector models
Search coil fitted
Test Target
Bronze Age axe      10x3 cm
Durotriges base silver stater
Celtic fibula
Vespasian denarius   18mm
Roman sesterius       32mm
Roman bronze ring    22mm
Roman silver ring       20mm
Saxon silver sceat       8mm
Saxon Gold Tremissis 14mm
Round Hammered Farthing
Edward I silver penny   18mm
silver ring                    23mm
1707 silver sixpence    18mm
1921 bronze penny      30mm
1889 silver crown         40mm
21.5"
15"
13.5"
12.5
9
8
5.5
4
3
12.5
9
8.5
16
11.5
10.5
14
11
10
12.5
10
9
8
5.5
4
10.5
7.5
6
8
5.5
4.5
11.5
8.5
7.5
14
11
10.5
12.5
9
8.5
15
11
10.5
16
12
11
All metal
All metal
Disc
TESTS
Underground
Beach
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