One way to ensure maximum protection against stainless steel, non-ferrous and ferrous contamination is by using industrial metal detectors. Hence they are widely used by chemical, textile, plastic, cosmetics, medical, rubber, paper, pharmaceutical, dairy and food industries. The downstream equipments can be safeguarded against contamination to a good extent by using such metal detectors. Bombs and weapons can also be effectively detected by them. Metallic objects present under water can be located using underwater metal detectors. Security checkpoints use walk through ones to determine the presence of concealed weapons. Other features of this type of metal detectors are quality control, environmental tolerance and electromagnetic compatibility. Small sized metal objects can be detected using hand held devices. Most of the industrial metal detectors require less frequent maintenance. They are designed specifically to meet the requirements of the industry. With the use of such detectors, the industry can increase productivity, avoid catastrophes and reduce downtime.