YSI 556 Multi-Probe System™

Versatility of a Lab--The Convenience of a Portable Meter

Simultaneously measures dissolved oxygen, pH, conductivity, temperature and ORP. Ideal for testing water in a variety of applications. 556 Multi-Probe Meter With Barometer can be user-calibrated and used in dissolved oxygen calibrations for tracking changes in barometric pressure.
Specifications: Stores over 49,000 data sets with date and time stamp. Available with three different cable lengths. Four C-cell batteries provide up to 60 hours of power or use the Rechargeable NiMH Battery Pack for repeated use and quick recharges. 4.7" x 9" and weighs 2.1 lb.