YSI 556
Water Quality Flow Cell/Handheld Meter
Featured Rental
Not only is the 556 our most popular flow cell rental instrument, it also is our most advanced handheld instrument for surface or groundwater measurements. The 556 is capable of measuring, displaying, and logging 5 standard parameters simultaneously (pH/Conductivity/ORP/DO/temperature). In addition both salinity and total dissolved solids can be automatically calculated. Highly accurate, dependable, and repeatable readings are obtained through high end features like automatic temperature, salinity, and altitude compensation. Advanced datalogging combined with YSI’s EcoWatch software assist in good lab practices. Every YSI 556 rental comes fully calibrated by our factory certified technicians and includes a flow cell.
Ranges
- pH
- 0 to 14 pH
- Resolution 0.01 pH
- Accuracy ±0.2 pH
- ORP
- -999 to 999 mV
- Resolution 0.1 mV
- Accuracy ±20 mV
- Dissolved Oxygen
- 0 to 500% air saturation
- 0 to 50 mg/L
- Resolution 0.1% air saturation
- Resolution 0.01 mg/L
- Accuracy ±0.2 mg/L or ±2% @ < 200% air saturation
- Accuracy ±6% @ > 200% air saturation
- Conductivity (auto-ranging)
- 0 to 200 mS/cm
- Resolution 0.1 µS/cm @ < 499.99 µS/cm
- Resolution 1 µS/cm @ < 4999 µS/cm
- Resolution 0.01 mS/cm @ < 49.99 mS/cm
- Resolution 0.1 mS/cm @ > 49.99 mS/cm
- Accuracy ±0.5%
- Salinity
- 0 to 70 ppt
- Resolution 0.1 ppt
- Accuracy ±1% or ±0.1 ppt
- Total Dissolved Solids
- 0 to 100 g/L
- Temperature
- 23 to 113°F
- -5 to 45°C
- Resolution 0.1°
- Accuracy ±0.27°F or ±0.15°C
Features
- Simultaneously measures and displays 5 parameters
- Operates with a flow cell or as a handheld unit
- Advanced datalogging assists with GLP
- Rental includes flow cell and accessories
- Extended DO range
- Internal barometer for automatic DO compensation
- Automatic temperature compensation
- Automatic salinity compensation
- Large backlit LCD display with automatic contrast adjustment
- PC interface
- Advanced PC software
- Waterproof and resistant to impacts
Specifications
- Datalogging points 49,000
- PC interface RS232
- Input power 4 C alkaline batteries
- Runtime 50 hours
- IP rating 67
- Probe diameter 1.65″
- Dimensions 4.7″ x 9″
- Weight 2.1 lbs








