When Was the Metal Detector Invented?

When Was the Metal Detector Invented?

The first metal detector was invented in 1881 by Alexander Graham Bell. He attempted to use the device to locate a bullet in the chest of U.S. President James Garfield. Although the machine worked properly, Graham deemed it a failure because it was unable to locate the bullet.

Alexander Graham Bell did not realize that President Garfield was lying on a metal spring that confused his device. In 1925, Gerard Fischar invented a portable metal detector based on a system of radio-direction finding; it was sold commercially in 1931. During this time in Germany, H. Geffchen and H. Richter, invented the first walk-through metal detector.