Metal fingerprint
The metal head fingerprint is made of stainless steel and is fixed by a nut. The installation hole diameter is 25mm and the thread length is 19mm, which is very convenient for users to install. Metal head fingerprints have the ability of self-learning fingerprint patterns and can memorize user fingerprint characteristics. Fingerprints will become easier to use and more sensitive.
Ordinary waterproof metal nut fingerprints are equipped with a 50-capacity fingerprint head, and a high-resolution 160*160 fingerprint sensor is used for good recognition.

High-grade waterproof metal fingerprint
The high-grade waterproof metal nut fingerprint is equipped with a 300-capacity fingerprint head as standard, and adopts a Swedish FPC biocapacitive high-resolution 192*192 fingerprint sensor, which has a better recognition effect and effectively eliminates fake fingerprints.
The fingerprint module is equipped with a 500mm cable as standard,
Note: The default shipping accessories do not provide one-key unlocking terminal wire.
If your host computer is a PLC or industrial control touch screen device, you need to use Modbus RTU communication, you need to take another TTL to 485 communication module, otherwise 485 communication will not be possible.

Basic operation
1. Press the button to restore factory settings:
When the board is powered on, keep pressing the "setting key" for more than 10s, the red indicator light on the circuit board lights up and the fingerprint module starts to light up in white. At this time, release the "setting key" and fingerprint If the green light is always on for 1s, it means the deletion is successful; if the fingerprint is always on for 1s, it means the deletion has failed. After restoring the factory state, the system will clear all fingerprint libraries. At this time, the system is in demonstration mode, and any fingerprint can control the relay to open.