In access control system, there are few things will effective the reading distance to the access control RFID card reader.
Types of reader and Types of cards, keyfobs effective reading distance
The standard reading distance of the general card reader is 4-10 cm, the reading distance of the ID card reader is slightly longer, and the reading distance of the IC card is slightly shorter. If using access control keyfob, the reading distance will shorter than using RFID Card, generally 1-3 cm. The general card reader does not unilaterally pursue the card reading distance, but pays attention to the stability of the card reader. The access control card reader product does not read the card in the critical area of the card reading magnetic field, but reads the card in the area with sufficient magnetic field energy to increase the its stability.
Ways to read cards effective the reading distance
The way to read the card, it is recommended to use the card to face the card and approach it naturally. We do not suggest read card by quickly swiping from the side.
Metal environment effective the reading distance
Since the card reader is a radio frequency product, the metal pair near the front or the rear will absorb its radio frequency signal if the card reader installs on the metal surface. . If the metal surface is larger, it even affects the card reader not able to read cards. Or the card reading distance is attenuated very much. In addition, the proximity of the two card readers will also affect the card readers, some will shorten the card reading distance, and some will cause the two card readers to read cards at the same time.
The solution is: try not to install it on a metal plane, or dig out the metal part of the card reader installation back, or raise the card reader 1-2 cm on the metal surface, and keep the distance between the card readers at 25cm above.
Different brands of chips effective the reading distance
Differences between different chip brands, different chip brands will also have different reading distance effects, resulting in some differences, there is a distance difference