Versatile portable multiparameter instrument with digital sensors.

The YSI ProDSS (Digital Sampling System) is a portable multiparameter instrument developed for the measurement of several critical parameters allowing accurate monitoring of the water quality: dissolved oxygen (optical), turbidity, pH, ORP, conductivity, specific conductance, salinity, TDS, resistivity, TSS, ammonium, ammonia, chloride, nitrate, chlorophyll, blue algae, depth and temperature.