what’s the best way to detect the magnet? Use anther magnet. But it’s not sensitive enough. You have to feel it by youself.Right！This Hall sensor knows whether there is a magnetic object nearby or not. And it correctly tells you through ditigal output.See below picture for a quick demo!
Note: It’s a omnipolar magnet dectector so that it can not tell two polarities apart.

Useful link:

For more information refer to the tutorial

Features:

1. Digital sensor for magnetic field detection
2. Outputs digital signals (high/low)
3. Adjustable sensitivity
4. Wide voltage range
5. Compact design

Package Includes:

1 x Hall Sensor

1 x cable