Grounding mat

An antistatic device is any device that reduces, dampens, or otherwise inhibits electrostatic discharge; the buildup or discharge of static electricity, which can damage electrical components such as computer hard drives, and even ignite flammable liquids and gases.

Many methods exist for neutralizing, varying in use and effectiveness depending on the application. Antistatic agents are chemical compounds that can be added to an object, or the packaging of an object, to help deter the buildup or discharge of static electricity. For the neutralization of static charge in a larger area, such as a factory floor or workshop, antistatic systems may utilize electron emission effects such as corona discharge or photoemission that introduce ions into the area that combine with and neutralize any electrically charged object. In many situations, sufficient ESD protection can be achieved with electrical grounding.

Various symbols can be found on products, indicating that the product is electrostatically sensitive, as with sensitive electrical components, or that it offers antistatic protection, as with antistatic bags.

ANSI/ESD standard S8.1-2007 is most commonly seen on applications related to electronics. Several variations consist of a triangle with a reaching hand depicted inside of it using negative space.

Versions of the symbol will often have the hand being crossed out as a warning for the component being protected, indicating that it is ESD sensitive and is not to be touched unless antistatic precautions are taken.

Another version of the symbol has the triangle surrounded by an arc. This variant is in reference to the antistatic protective device, such as an antistatic wrist strap, rather than the component being protected. It usually does not feature the hand being crossed out, indicating that it makes contact with the component safe.

Another common symbol takes the form of a bold circle being intersected by three arrows. Originating as a U.S. military standard, it has been adopted industry-wide. It is intended as a depiction of a device or component being breached by static charges, indicated by the arrows.

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Wikipedia