This is the MLX90324 Magnetic Hall Effect Monolithic Touchless Rotation Sensor developed by MELEXIS Semiconductor. This MLX90324 is a sensor that uses its signature called TriaXis Hall Technology means that it uses a magnetic force to drive this sensor. moreover,
Wiring Reed Switch Module with Arduino Microcontroller
On this illustration we will going to wire the Reed Switch Module. This module provides an analog as well as digital interface, as you can see on the board it has a potentiometer / trimmer used as a pull up