Catalog > Internet of Things (IOT) Related Products > More Platforms Hall Switch Sensor Hall Switch Sensor BSK THRESHOLD ADJUST HALL SENSOR A3144 HALL SENSOR ON PCB. ADUSTABLE THRESHOLD. USING LM393 COMPARATOR. 3.3/5V Discontinued Specifications, Prices & Availability may change without notice. Images are for illustration purposes only. E&OE Features Support 5 V / 3.3 V Voltage InputOn-board signal output, the output signal is effective instruction low level and at the same time, the output signal lights out can be directly and single-chip microcomputer IO connectionSignal detection sensitivity can adjustReserve all the way more circuits (P3 voltage drawn)On-board LM393 voltage comparator chip and hall sensing probe