A popular type of magnetic sensor called a Hall effect sensor is commonly used to measure the direction and strength of a magnetic field generated by an electromagnet or permanent magnet, the output of which varies in direct proportion to the strength of the magnetic field being measured. Also, magnetic sensors transform magnetic or magnetically encoded data into electrical signals for processing by electronic circuits. Hall effect sensors are gaining popularity due to their wide range of applications, including location, velocity, and directional movement sensing.

Application

Hall effect sensor are used to detect the voltage that a magnetic field induces on a conductor. Depending on the electronics integrated inside the detecting package, the sensor output may be binary or proportional to the strength and direction of the magnetic field.

• Open-Closed Door Sensor 

The door (or window) open/shut sensor is arguably the most widely used Hall effect sensor in daily living and smart spaces. The sensor device is mounted on the door, and a magnet is attached to the door frame. The Hall effect sensor is activated when the door sensor lines up with the magnet and closes. When the door is ajar, the Hall effect sensor then shuts off. There are numerous ways to incorporate this sensor with CAN bus or other smart space features. 

• Hall Effect Probe 

A calibrated tool for measuring magnetic field strength is called a Hall probe. In contrast to the other gadgets on this list, the typical use of such a device is not equipment automation or monitoring, but rather scientific measurement and experimentation. A Hall effect probe may never be required by some users, but it can be crucial for thorough scientific research.

• Brushless DC (BLDC) Motor Control

Hall effect sensors are an essential component contributing to controlling specific types of BLDC motors, they help in maintaining accurate speed control based on the magnetic effects. 

• Cycling Speed Detector 

Usually, a permanent magnet attached to a spoke travels past a sensor unit once each rotation in bicycle computers. With the wheel diameter and some math, one can infer the linear speed of a bicycle by using magnetic cycling that is comparable to the wheel's RPM. The magnet is detected by a Hall effect sensor, which also transmits data to other bike computer circuits.

• Current Sensing 

Few gadgets can detect magnetic fields produced by the flow of electrical current in the same way that a Hall effect sensor can detect magnetic fields from permanent magnets. By acting as a non-contact current sensor in this design, a Hall effect device makes it possible to monitor without requiring changes to the wiring setup. An electric wire can have a Hall effect sensor installed around it to eliminate the need for direct connection and disconnections.

• Keyboard Hall Effect Switches 

Some keyboards utilize Hall effect sensors to detect key presses, but the majority use physical switches. Key presses can be read as analog inputs thanks to the analog capabilities of a Hall effect sensor. Think about how this could replace the requirement for a shift key, allowing you to manage capitalization with a combination of short and long pushes, or how trigger points could be dynamically changed. Combined, the keys may potentially function as an analog joystick. 

Get the Best

The sensor element and additional electrical components needed to format the output signal for your application are usually included in hall effect sensor packages. Many of them are prepared for integration into your sensing project and are solid-state, sealed devices that are typically quite robust. Many trusted service providers offer products from leading manufacturers if you're searching for the ideal Hall effect sensor.