Metal Detectors Info

Author: Sally Taylor

Dowsing, also known as divining, is the practice of finding water, minerals, caves, missing items or people, and locating illnesses in the body using tools such as pendulums and maps or two L shaped or forked sticks. One method of dowsing involves holding the sticks in front of you while you walk and noting when the sticks cross or pull toward the ground and another, which has a bit less obvious scientific reasoning, involves holding a pendulum over a map.

Records of knowledge of the art of dowsing go back 8,000 years. The earliest record of dowsing comes from cave paintings dating back 8,000 years found in the Tassali Caves in the Atlas Mountains of North Africa. A large wall painting in one of the caves depicts a man holding a forked stick looking for water while others watch. In Egypt 4,000 year old wall etchings depict Pharaohs dowsing and a 2,500 year old etching in China depicts a ruler dowsing as well. References are made to dowsing in scores of ancient literature including the Bible. By the middle ages German miners relied heavily on dowsing skills to locate their caches. The 31st president of the USA, Herbert Hoover was a mining engineer and a known, as well as a publicly admitted, dowser.

Today while many scoff a the idea of dowsing having any scientific basis, many members of both the British and American Societies of Dowsers are earning impressive amounts of money from major companies for their help in locating minerals, water, underground wires and pipelines, and even missing persons. The United States Government spent 35 million dollars researching and training "remote viewers" over a twenty year period during the Viet Nam era. In Russia and several other countries, dowsing is widely respected and taught as any other vocational skill. The principles by which dowsing works are just beginning to be understood on a scientific level, however.

While scientific minds have not been widely convinced that the art is anything more than superstition or "witchery", increasing understanding of earth energies is building evidence of a scientific basis for forms of the art. Modern scientific instruments have been able to uncover many forms of earth energies that were previously undetectable. For example, some of these subtle earth energies form Curry lines which are a grid of energy lines traversing the planet. These lines can become disturbed at points where other energies create interference. Ley lines are another form of energy p

Author: Sophie H. Hanson

Security metal detectors are devices that allow people to screen any metallic object in security zones. Most of these detectors work with very low frequency technology, but the most advanced ones use low radiation x-rays to accomplish their purpose. Security metal detectors are most used in places like airport security checkpoints, government buildings security, and courthouse security. Other places where they are used are public schools and special events like football games.

There are two types of security metal detectors: hand held metal detectors and walk through metal detectors. The first ones are used by security and law enforcement officers, these devices allow them to detect pistols and knives, and it is possible to use a reduction switch to lower sensitivity interference.

A special variation of them are tactical handheld metal detectors which are more advanced and don''t require to be adjusted, they are able to detect stainless steel ferrous and non-ferrous weapons. Portable hand metal security detectors can detect weapons or any kind of metal piece a person may be carrying, and they can check objects for magnetic or non magnetic fields, they are very reliable and their batteries last for a long time.

Walk through security metal detectors can use two kinds of technology. Those with digital technology allow to have a better target detection coverage, and are very useful in airport security. Those which are based on a micro processor can avoid any electrical interference with x-ray devices.

Walkthrough metal detectors can also be divided in multizone and single zone walk through security metal detectors. The first ones are used in high security levels and include a sensitive device that allows them to detect regular weapons like pistols and knives. They can be assembled and transported without any difficulty.

The second ones are used in cruise chips and public places, and metal detectors in public schools are also very common, and they have medium sensitivity and other features like water proof electronics so they can be protected against humidity.

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