The iButton® is a computer chip enclosed in a 16mm stainless steel can. Because of this unique and durable stainless steel can, the button can be mounted virtually anywhere. It is rugged enough to withstand harsh environments, indoors or outdoors.
The Can and Grommet
iButton CanAll iButtons use their stainless steel "Can" for their electronic communications interface. Each "Can" has a data contact which is called the "Lid" and a ground contact which is called the "Base". Each of these contacts is connected to the silicon chip inside. The "Lid" is the top of the "Can" and the "Base" forms the sides and the bottom of the "Can" and includes a flange for easily attaching the button to just about anything. The two contacts are separated by a polypropylene grommet.
How Durable is the iButton?
The silicon chip within the iButton is protected by the ultimate durable material: stainless steel. You can drop it, step on it, or scratch it. The iButton is wear-tested for 10-year durability.