The OH137 Magnetic Sensors TO-92S RoHS is a reliable, cost-effective, and compact electronic part manufactured by Ouzhuo. This device comes in the standard three-pin TO-92S package and is used to detect and measure the presence of a magnetic field. It is capable of responding to a wide range of magnetic field intensities, making it widely applicable for various use cases. Furthermore, the device is RoHS compliant, guaranteeing that is ecologically friendly and its operation is safe. This device has a wide range of applications, such as positioning, sensing, and switching devices.