A3422LKA-T

A3422LKA-T is a magnetic sensor, switch belonging to a class known as solid state. Technically, it is classified as a differential Hall-effect chopper-stabilized sensor. It works by detecting differences in the magnetic fields. The sensor then converts this difference into an analogue output.

A3422LKA-T is mainly used for industrial applications such as level or position sensing, i.e. sensing a specific area or location within a closed system. Although ideal for sensing a single spot, the device has the capacity to sense two spots at once, which is ideal for measuring two distinct points in a circular or linear path. The accuracy of the device is approximately 0.175% and offers a temperature range between -40°C to +105°C without any signal loss. Moreover, its low power consumption makes it perfect for battery powered applications.

The device works on the principle of differential Hall-effect. A differential Hall-effect is a method used to measure the magnetic field variations that occur in response to current travelling through a conductor. Inside the device is a Hall-effect sensor, which detects the difference in magnetic fields in two locations along the X and Y axis. The sensor then converts this difference into an analogue output, which is then used to trigger an appropriate action.

The working principles of the device are quite simple. The device produces a bridge movement from left to right, indicating the direction of the current. The range of the movement is dependent on the current and magnetic fields that are produced from the conductor. When the magnet is close to the sensor, the bridge will move in the direction of the current, producing a low-level signal. As the distance is increased, the bridge will move away from the current and produce a high-level signal. By monitoring these levels, it is possible to detect subtle changes in the direction of the current.

In conclusion, A3422LKA-T is a powerful, reliable and cost-effective magnetic sensor, switch defecting differences in magnetic fields for industrial applications. The device operates on the principle of differential Hall-effect and is an excellent choice for level or position sensing. Its low power consumption makes it a perfect choice for battery powered applications.