The YSI 556 monitoring system is a rugged and proven instrument for field use. The instrument is easily portable and configured for multiple applications such as for parameters in 2" monitoring wells, open water monitoring, and for Low Flow Sampling using the unit's accompanying in-line flow cell.
Features Include:
- Field Replaceable Dissolved Oxygen Membranes
- Extensive Data Logging Capabilities
- Flow Cell (Included with Rental)
- All Readings Appear On One Large Easy To Read Display
- Multiple Cable Lengths For Various Applications
- Operates On Field Replaceable Alkaline Batteries (4-Cs)
Simultaneous measurement of 7 Parameters:
- pH
- Dissolved Oxygen
- Conductivity
- Salinity
- Total Dissolved Solids
- Temperature
- Oxidation Reduction Potential
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YSI 556 System Specifications (Instrument with Cable & Probe)
Sensor
|
Sensor Type |
Accuracy |
Resolution |
Dissolved Oxygen (%)
|
Polarographic
|
0 to 200% air saturation, ± 2% of the reading or ± 2% air saturation, whichever is greater; 200 to 500% air saturation, ± 6% of the reading |
0.1% air saturation |
Dissolved Oxygen (mg/L)
|
Polarographic |
0 to 20 mg/L, ± 0.2 mg/L or ± 2% of reading, whichever is greater; 20 to 50 mg/L, ± 6% of the reading |
0.01 mg/L |
Temperature
|
Thermistor |
±0.15°C |
0.1°C |
| Conductivity |
Four electrode cell
|
±0.5% of reading or 0.001 mS/cm, whichever is greater (4-m cable) ±1% of reading or 0.001 mS/cm, whichever is greater (20-m cable) |
0.001 mS/cm to 0.1 mS/cm (range dependent) |
| Salinity |
Calculated from conductivity and temperature |
±1.0% of reading or 0.1 ppt, whichever is greater |
0.01 ppt |
pH (optional)
|
Glass Combination Electrode |
±0.2 units |
0.01 units |
| ORP (optional) |
Platinum button |
±20 mV |
0.1 mV |
| Total Dissolved Solids (TDS) |
Calculated from conductivity and temperature |
|
4 digits |
