The UV300 is a cost effective water analyser for applications focused on one or two parameters. Mainly based on UV spectroscopy, well known for its stability and low operating cost, the UV300 can measure parameters like organic matter, nitrate, colour, aromatics hydrocarbons (PAH).A complementary module allows the measurement of PO4, Cl2, NO2, Fe, Al by colorimetric method and turbidity by laser diode. External probes can be added for physicochemical parameters like pH, ORP, dissolved oxygen and conductivity. Thanks to its automatic cleaning system and its extremely long life time lamp, the maintenance is roughly limited to the periodic refill of the inexpensive cleaning solution. A new web-based interface allows the control and the troubleshooting from internet on laptop, tablet or i-phone.