With the continuous progress of science and technology, NFC technology is widely used in access control system to improve the security and convenience of access control. But sometimes NFC can't be read when using the water drop access card. Why? Let's answer them one by one.

Reason 1: The access card is too far away from the card reader.

The access card is too far away from the card reader, which leads to the failure of NFC signal transmission.

Solution: Put the access card close to the card reader, and it is generally recommended that the distance should not exceed 5cm.

Reason 2: The access card surface is damaged or stained too much.

Damage or excessive stains on the access card surface will affect the transmission of NFC signals.

Solution: Wipe the surface of the access card gently with a clean soft cloth, or replace it with a new one.

Reason 3: Card reader failure or improper access control system setting.

Failure of the card reader or improper setting of the access control system will make it impossible to read the access control card information.

Solution: Contact the access control system administrator or maintenance personnel for inspection and maintenance.

When we encounter the situation that the water drop access card cannot read NFC, we must first eliminate the above three possible reasons to ensure the normal use of the access control system. If the above methods can't solve the problem, you can consider replacing the access control system or contacting professional access control system maintenance personnel.