high risk of infection with COVID-19, production plants are threatened with the failure of entire production lines as well as the destruction of finished products through infection, or simply suspicion [...] multicolour LED light from Pfannenberg functions like a traffic light: a red signal indicates that access is denied, whereas a green signal indicates that no abnormalities have been detected and access is granted [...] Users can choose between different signalling modes and high performance and visibility, even in daylight, is always guaranteed thanks to the ultra-bright LED technology. Faster, more hygienic and