This Harmony XB5, plain lens yellow flush head with illuminated ring operates with a spring return / impulse mechanism. This button head with illuminated ring provides an ergonomic interface for controlling your machines. It is easily installed and replaced on compatible complete push-button units and contact blocks via snap-fit assembly. It is clearly distinguishable visually at a distance thanks to its illuminated ring and clear color. It is impact resistant, dust resistant, water resistant and vibration resistant thanks to its IP66. It has a plastic bezel, this makes it ideal for applications requiring good resistance to chemical agents and/or double electrical insulation. It is designed to fit in a standard 22mm cutout, ensuring compatibility when installing in pre-existing machinery. Its wide range of operating temperatures from -40°C to 70°C allows versatility in usage of product. It provides high brightness for easy identification of function and operation mode, even in brightly lit environments.