The OH921 magnetic sensor from Ouzhuo is a surface-mount, lead-free, TO-92S RoHS semiconductor device. It consists of a diplex Darlington output pair designed with three monolithic Hall-effect integrated circuits. These are designed to respond to alternating and direct magnetic fields and detect its polarity. It offers a fast response time, excellent temperature stability, low power consumption, high magnetic sensitivity, and high stability against temperature influences. Additionally, it offers a wide operating temperature range from -40°C to +150°C and a wide supply voltage range from 4.5V to 24V. Furthermore, it is certified compliant with RoHS standards, providing high reliability and improved environmental performance.