Instrument
Medium: Fresh, sea or polluted water
Computer Interface: RS232, SDI-12

Displays & logger

• Display: High-resolution 8X20 LCD
• Power: Internal rechargeable nickel metal hydride battery pack (supplies power to YSI 6820). 6 hours continuous operation
• Memory: YSI 610-D has 32K of battery-backed RAM for Stash and Notepad

Parameters:

• Dissolved oxygen - % saturation
  Range: 0 to 200%; Resolution: 0.1%
• Dissolved oxygen - mg/L
  Range: 0 to 20 mg/L; Resolution: 0.01 mg/L
• Conductivity:
  Range: 0 to 100 mS/cm; Resolution: 0.001 to 0.1 mS/cm (range-dependent)
• Temperature:
  Range: -5 to +45°C; Resolution: 0.01°C
• pH
  Range: 0 to 14 units; Resolution: 0.01 unit
• pH-low-ionic-strength
  Range: 2 to 12 units; Resolution: 0.01 unit
• Non-vented depth, middle
  Range: 0 to 200 feet; Resolution: 0.001 foot
• Non-vented depth, shallow
  Range: 0 to 30 feet; Resolution: 0.001 foot
• ORP
  Range: -999 to +999 mV; Resolution: 0.1 mV
• Salinity
  Range: 0 to 70 PPT; Resolution: 0.01 PPT
• Nitrate-nitrogen
  Range: 0 to 200 mg/L-N; Resolution: 0.001 mg/L-N to 1 mg/L-N (range-dependent)
• Ammonium-nitrogen
  Range: 0 to 200 mg/L-N; Resolution: 0.001 to 1 mg/L-N (range-dependent)
• Ammonia
  Range: 0 to 200 mg/L-N; Resolution: 0.001 to 1 mg/L-N (range-dependent)
• Turbidity
  Range: 0 to 1,000 NTU; Resolution: 0.1 NTU