The glycol scanner reacts to very small amounts of glycols in the water. This makes it possible to measure very small quantities of glycols in a medium within seconds. The glycol scanner consists of several combined sensor units. The wetted parts are made of stainless steel DIN 1.4571 as standard. The desired limit value can be set as a percentage in the electronic control unit. If the limit value is exceeded, an alarm message is transmitted to the building management system and further measures are taken depending on the technical design. The measured glycol concentration can be called up in the submenu of the control unit. The intelligent control system allows the type of glycol used to be selected, thereby achieving an optimum measured value. The flow monitors and the temperature and water sensors ensure reliable monitoring of the safety system.