How does a metal detector work?
When electricity flows through the transmitter coil, it creates a magnetic field all around it. If you sweep the detector above a metal object (such as this old gray spanner), the magnetic field penetrates right through it. The magnetic field makes an electric current flow inside the metal object.
The basic principles
Balance Coil, magnetic induction.
What does a metal detector find?
Can find: gold, silver, iron, nickel, copper, aluminum, tin etc.
Can not: diamonds, pearls, bone, paper, stone figures, hair.
Comparison of all metal detector and metal detector for aluminum film package.
What is a checkweigher?
A check weigher is an automatic machine for the checking the weight of packaged commodities. It is normally found at the offgoing end of a production process and is used to ensure that the weight of a pack of the commdituy is within specified limits.
