...
Product page: https://vutlan.com/analog-sensors/18-vt530-access-sensor.html
...
 |  |
Function and purpose
The VT530 Access Sensor is essential for access control and is designed to monitor the status of doors and windows (open or closed). It consists of two parts: a magnet and a sensor, ensuring accurate detection of access points being opened or closed. It can be connected to any analog port (A1...A8) of the Vutlan monitoring unit and supports daisy chaining, allowing multiple sensors to be linked in a series for easy and scalable installations.
...