Rugged,reliable and waterproof, the YSI 556 MPS (Multiprobe System) combines the versatility of an easy-to-use, easy-to-read handheld unit with all the functionality of a multiparameter system.
Featuring a waterproof IP-67, impact-resistant case, the YSI 556 MPS simultaneously measures dissolved oxygen, pH, conductivity, temperature, and ORP. The YSI 556 MPS assists the user in conforming to GLP standards.
Field-replaceable DO electrode modules; pH and pH/ORP probes
RS-232 and Compatible with EcowatchTM for WindowsTM data analysis software
Easy-to-use, screw-on cap DO membranes
NEW! The YSI 556 now comes with the new PE membranes for faster response times and lower stirring dependence.
User-upgradable software from YSI website
Three-year warranty on the instrument; one-year on the probe module and cables
Available with 4,10, and 20 m cable lengths
Stores over 49,000 data sets, time and date stamped
Features
Battery Options
The unit is powered by alkaline batteries or an optional rechargeable battery pack (YSI Part # 6118) with fast charge feature.
Optional Barometer
Internal barometer can be user-calibrated and displayed along with other data, used in dissolved oxygen calibrations, and logged to memory for tracking changes in barometric pressure.
Carrying Case
The instrument comes standard with a soft-sided carrying case with enough space for the YSI 556 MPS, a 20-meter cable, and calibrating supplies.
A handstrap can be connected on either the right or left side of the instrument.
Cable lengths
Specify cable length when ordering, 4, 10, and 20 m cables available. Cables include conductivity, DO, and temperature. Optional probes include pH or pH/ORP combination probe.
YSI 556 Instrument General Specifications
Barometer
Optional
Cables
4, 10, or 20 meters (13.1, 32.8, 65.6 ft)
Communications
RS-232 Serial
Connector
MS (military spec) waterproof with bayonet lock
Data Management
Data Manager desktop software included; 100 user-defined folders and site names
Data Memory
2,000 data sets (data, date, time, user-defined info); 100 GLP files
Dimensions
11.9 cm width x 22.9 cm length (4.7 in x 9 in)
Logging
49,000 data sets, date and time stamp, manual or logging, with user-selectable intervals
Power
4 alkaline C-cells; optional rechargeable pack
Warranty
3-year instrument; 1-year probes and cables
Weight with Batteries
916 grams (2.1 lbs)
YSI 556 System Specifications (Instrument with Cable & Probe)
Sensor Type
Range
Accuracy
Resolution
Dissolved Oxygen (%)
Polarographic
0 to 500% air saturation
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 50 mg/L
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
-5 to 45°C
±0.15°C
0.1°C
Conductivity
Four electrode cell
0 to 200 mS/cm (auto range)
±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
0 to 70 ppt
±1.0% of reading or 0.1 ppt, whichever is greater
0.01 ppt
pH (optional)
Glass Combination Electrode
0 to 14 units
±0.2 units
0.01 units
ORP (optional)
Platinum button
-1999 to +1999 mV
±20 mV
0.1 mV
Total Dissolved Solids (TDS)
Calculated from conductivity and temperature
0 too 100 g/L
4 digits
Barometer (optional)
500 to 800 mmHg
±3 mmHg within ±10°C temperature range from calibration point
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