It is based on a high-resolution UV-visible spectrograph. It simultaneously monitors many different parameters for wastewater treatment plants or river monitoring stations with excellent stability and low costs. The same spectrograph can measure organics, nitrates, color, turbidity, phosphates, ammonia and hydrogen sulfide. The fluorescence module measures aromatic hydrocarbons (PAHs) and the infrared laser diode nephelometric turbidity. The patented flow cell allows very high solids content.