The new LED signal tower CleanSign from Werma was developed and constructed for use in food and hygiene areas. The existing standards and directives (e.g. EHEDG documents 8 and 13, machinery directive 2006/42/EG) were implemented. Thanks to its compact construction, the LED signal tower doesn't have any uneven surfaces, grooves or joints where dirt could collect. This prevents impurities, significantly reducing the risk of contamination. The chamfer of at least 3° as called for by the EHEDG has been applied in the design of the device: The 30° chamfer of the upper housing and bracket guarantees the rapid drainage of liquids, quick cleaning and easy inspection.