Titanium S2 is a TDS meter with 2 titanium probes , which makes it possible to measure, to control very simply and with precision the level of dissolved solids (TDS) at two places of your choice, in general at the entrance or at the exit of an osmosis unit. It allows, for example, to immediately see whether the quality of the water leaving an osmosis unit is pure or not. It can be calibrated regularly to get accurate results. Its magnetic rear face facilitates its installation on the metal frame of an osmosis unit.