Photo Gallery: Door Hardware Basics
A biometric reader uses part of your body as the identifier. With hand geometry, you lay your hand on a reader and, if your hand matches the template that was created when you enrolled, the door unlocks and you are admitted. Biometrics provides the highest level of security and greatest convenience as people always have their hands with them.
An access card or biometric needs a reader. That reader is typically next to a door. In some cases, the lock mechanism and reader are all in one unit.
