Hygiene in evaporative cooling towers is extremely important, and has been regulated since January 2015 by technical directive VDI 2047, Sheet 2. This is because people have already died (Legionnaire's disease) due to the growth of germs (legionellosis) in cooling towers. To ensure that your cooling water is safe and that this state can be proven we recommend the JUMO AQUIS touch S. The multichannel controller can not only record all of the measurands in the process, but also control the dosing of biocide and the desalination process.