Linear Magnetic Hall Sensor KY-024

Linear Magnetic Hall Sensor KY-024

Sensors
DET574
Part.No: KY-024
€2.25
In Stock
Immediate Dispatch
The KY-024 Linear Magnetic Hall Sensor is a compact Arduino-compatible module that detects the presence and strength of magnetic fields, providing both analog and digital output signals for your projects.

 

The KY-024 Linear Magnetic Hall Sensor (MPN: KY-024) is a versatile magnetic field detection module designed for use with Arduino and compatible microcontroller platforms. It uses a Hall effect sensor to detect the presence, direction, and relative intensity of a magnetic field, making it ideal for position sensing, proximity detection, and contactless switching applications. The module outputs both a digital signal (threshold-based) and an analog signal (proportional to field strength), giving you maximum flexibility in your designs.

Key Features

  • Dual Output: Provides both analog and digital outputs → use digital for simple detection or analog for field intensity measurement
  • Linear Detection: The analog output varies linearly with magnetic field strength → enables precise field measurement, not just on/off detection
  • Adjustable Sensitivity: On-board potentiometer allows threshold adjustment for the digital output → fine-tune detection sensitivity without changing code
  • Low Energy Consumption: Designed for efficient power use → suitable for battery-powered or energy-conscious projects
  • Compact & Robust: Red PCB module with metal construction → strong mechanical stability and easy integration
  • Easy Installation: Standard 4-pin header interface → plug-and-play with Arduino sensor shields

Pinout & Wiring

PINSymbolDescription
1GNDGround
2VCCPower supply (3.3V – 5V)
3D0Digital output (HIGH/LOW based on threshold set by potentiometer)
4A0Analog output (voltage proportional to magnetic field strength)

Connect VCC to 5V and GND to GND on your Arduino. Connect D0 to a digital input pin for threshold-based detection, or A0 to an analog input pin (e.g., A0 on Arduino UNO) to read field intensity values.

Compatibility

  • Arduino UNO / Nano / Mega: Fully compatible at 5V — connect directly to 5V and GND rails; use analog pin for A0 output and any digital pin for D0
  • ESP32 / ESP8266: Compatible at 3.3V — use 3.3V supply; note that analog output will be scaled to 3.3V range
  • Raspberry Pi: Use 3.3V supply; D0 digital output can connect directly to GPIO; for A0, an external ADC (e.g., MCP3008) is required as RPi has no built-in ADC

Typical Applications

  • Proximity & Position Sensing: Detect when a magnet (attached to a moving part) passes near the sensor — perfect for encoder-style position feedback on motors or sliders
  • Contactless Speed Measurement: Count rotations of a magnet-equipped wheel or shaft without mechanical contact, ideal for RPM counters and tachometers
  • Door & Window Security Sensors: Detect the opening or closing of doors and windows using a small permanent magnet
  • Magnetic Field Mapping: Use the analog output to map the relative strength of magnetic fields in DIY science experiments or lab setups
  • Robotics & Automation: Detect end-of-travel positions on linear actuators or robotic arms using magnets as non-contact limit switches

Technical Specifications

ParameterValue
Module TypeLinear Magnetic Hall Effect Sensor
Output TypeAnalog (A0) + Digital (D0)
ColorRed
Dimensions60 × 80 mm
MPNKY-024
Package Contents: 1 × KY-024 Linear Magnetic Hall Sensor Module

⚠ Note: A permanent magnet is not included. Ensure the magnet used is brought close enough to the sensor face for reliable detection. Avoid exposing the module to strong stray magnetic fields during sensitive analog measurements.
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