The CH910SR with SOT-23-3L Hall Sensor ROHS is a Hall effect sensor manufactured by Cosemitech. It is a small, 3-lead, surface-mount device that detects magnetic fields produced by a variety of permanent magnets. It can measure both the strength and direction of magnetic fields, making it well-suited for a variety of applications including motor position sensing, motion detection, and RPM measurement. The device features an Ultra-Low Operating Current, Low Magnetic Sensitivity and a Wide Operating Temperature Range. It is RoHS compliant and designed to operate in extreme temperatures and environments.