The KY-024 Linear magnetic Hall sensor reacts in the presence of a magnetic field. It has a potentiometer to adjust the sensitivity of the sensor and it provides both analog and digital outputs.

The digital output acts as a switch that will turn on/off when a magnet is near, similar to the KY-003. On the other hand, the analog output can measure the polarity and relative strength of the magnetic field.

The KY-024 module consists of a 49E Linear Hall-Effect Sensor, a LM393 Dual Differential Comparator, a potentiomenter, two leds and six resistors. It's compatible with popular electronics platforms like Arduino, Raspberry Pi, Esp8266 and Teensy.