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YSI 556 Multiparameter Water Quality Meter

Supplier: HydroTerra

The 556 is a handheld field water quality meter which simultaneously measures pH, temperature, conductivity, dissolved oxygen and oxidation /reduction potential (ORP).

Price Guide: POA

There is a choice of 4, 10 and 20 m cable lengths for down-hole analysis and profiling. Options include an internal barometer for accurate dissolved oxygen calibration (with field replaceable membranes), a flow cell for use in groundwater sampling. ORP, pH, or combined pH /ORP sensors are also available, and all sensors are completely submersible. The PDA is completely protected against dust and against immersion up to 1 m (IP-67 rated). The operational lifetime is 180 hours with standard alkaline batteries.