YSI ProDSS nitrate sensor with replaceable module attached; ion selective electrode; 1, 2 or 3 point calibration; 20m maximum depth .

YSI's ProDIGITAL handheld systems are the industry leader for nearly any water quality application - surface water, groundwater, coastal waters, aquaculture, wastewater, or wherever your testing takes you.

The ProDSS, ProSwap, and ProSolo systems all feature rugged instruments, smart sensors, reliable cables, and powerful data management for optimal performance.