KY-035 Linear Hall Magnetic Sensor Module

The KY-035 Linear Hall Magnetic Sensor Module is a compact and precise magnetic field sensor based on the AH49E linear Hall-effect IC. It detects both the strength and polarity of magnetic fields, outputting a continuous analog voltage that varies linearly with field intensity. The module is ideal for applications requiring magnetic field measurement or proximity sensing, such as motor speed detection, current sensing, and non-contact positioning.

Powered by 3.0–6.5 V, the sensor outputs ~Vcc/2 when no magnetic field is present. Magnetic fields from the north pole decrease the output voltage, while south poles increase it. With a fast response time (~3 µs), low noise, and high sensitivity (~1.6 mV/G), this sensor is suitable for use with Arduino, ESP32, and other microcontroller platforms.

Features:

• Based on AH49E linear Hall-effect sensor
• Detects magnetic field strength and polarity
• Analog voltage output (~Vcc/2 at 0 Gauss)
• High sensitivity: ~1.6 mV/Gauss
• Fast response time (~3 µs)
• Compatible with 3.3 V and 5 V systems
• Low power consumption (~3.5 mA)
• KY-035 is suitable for Arduino, ESP32, and analog-input MCUs

Specifications:

Applications:

• Motor speed and shaft position sensing
• Proximity and magnetic field strength detection
• Current sensing in conductors
• Rotational speed or gear tooth sensors
• Liquid level detection with floating magnets

Resources:

• AH49E Datasheet
• Example Arduino interfacing