The FA 4851-2DN1H6H9H1 is a limit switch manufactured by Pizzato. It is a single-pole, single-throw switch that is used to control or limit the movement of a device. The switch is equipped with a wide variety of features, including an adjustable mechanical stop, momentary and latching operation modes, gold-plated contacts for better preventive contact welding, and adhesive label for easy identification and wiring. This switch also features a dependable long-lasting design and corrosion-resistant plastic body. It is suitable for a wide range of applications, such as access control, security systems, medical devices, industrial automation, and more.