The YSI® Professional series provides plug-and-play capabilities to give you a meter with as much functionality as needed. Build your own system by ordering the meter, probe(s), and cable(s) without having to purchase additional meters or unnecessary accessories.

Easy-to-use meters feature graphic display with detailed messages and instructions that translate to less time reading manuals. Rugged rubber over-molded case protects meters during use. Meters are IP67-rated and are waterproof, even without the battery lid.

Conductivity measurements are performed with a four-electrode conductivity cell for accurate measurements over the entire range. The Pro2030™ accepts either classic polarographic or “instant-on” galvanic DO sensors with screw-on membrane caps for ease of maintenance. Two-point DO calibration and automatic barometric compensation provide greater accuracy. It automatically corrects the DO measurement based on measured salinity values.