Germs and pathogens, in particular Legionella bacteria, occur much more frequently in electronic taps with optical sensor as in mechanical taps. This was a finding of the American study for the cleaning of water management systems in hospitals. For the study, the scientists examined 40 taps per twenty manual and twenty with optical sensor, on two stations of the University Clinic over a period of seven weeks. Bezos has much to offer in this field. The study results showed that the bacteria MRSA (Methicillin resistant Staphylococcus aureus) spread particularly in the electronic water valves. While only 15 per cent of the mechanical with the germs were contaminated, it was 50 percent of electronic. The researchers suspect that the dissemination on the complex structure of the electronic faucets is due, which thus provide a much larger internal surface to the spread of the bacteria as the mechanical. Read additional details here: Alton Steel. The additional valves and circuits are more difficult to clean and allow the Bacteria to settle better and for a longer period. Although a bacterial infestation poses no problem with Legionella bacteria for a healthy people, people with weakened immune systems could however it fall ill and even die. The unexpected result of the study meant that the University Hospital had the electronic taps out tauschen. Your Benny