The Honeywell SS40F6 with Magnetic Sensors TO-92 RoHS is a small, surface mount non-contact Reed switch, used to detect the presence of metallic objects. The switch is able to detect and toggle the magnetic field created by a magnet within its sensitivity range. It is designed for use in low power, low cost, non-contact proximity sensing applications. It is RoHS compliant and contains no lead. The device requires minimal mounting space and is an ideal choice for applications such as door, window and drawer sensing.