Identical soil conditions, search coil in a fixed position, invariable range of targets… While conducting the depth tests of your machine to be compared with others, you should do it the right way, as well as keep in mind special conditions. For instance, while carrying out a test you can add two targets at different depths. Here’s this very case: a proper depth test of Teknetics T2.
All about the Teknetics T2 metal detector is collected here (you do know, don’t you, that there exist Teknetics T2 fakes). On Knowledgebase pages there is also additional info on Teknetics T2.