You can reach more depth with your detector by properly adjusting the ground control of a manual type detector than you would expect from an “auto” setting. Pre-made machines will always perform well no matter what type of soil you are looking at. Adjusting the manual instrument may increase the depth of detection slightly, if done correctly, but if not done correctly, the results can be poor. For novice detector users, the performance of pre-set or automatic detectors outperforms those that can be obtained with an improperly set manual device.