YSI 556 Multiprobe Water Quality Meter
YSI 556 Multiprobe Water Quality Meter

YSI 556 Multiprobe Water Quality Meter

Pine Item #51657

Rugged and reliable, the YSI 556 MPS water quality analyzer (Multiprobe system) combines the versatility of an easy-to-use, easy-to-read handheld unit with all the functionality of a multi-parameter system. Featuring an IP-67, impact-resistant case, the YSI 556 MPS simultaneously measures dissolved oxygen, pH, conductivity, salinity, temperature, and ORP.

This monitor is designed for water quality applications and mainly used in the environmental industry. While this unit comes with a 4m cable, it also rents with the option of a 10m or 20m cable and Flow Cell.

Carrying Case - the instrument comes standard with a soft-sided carrying case with enough space for the YSI 556 MPS, a 4m cable (10-meter cable optional), flow cell, and calibrating supplies. A hand strap can be connected on either the right or left side of the instrument.


Standard 4m cable (available with a 10m or 20m cable)

Compatible with Ecowatch for Windows data analysis software

Easy-to-use screw-on cap DO membranes

Field-replacable DO electrode modules; pH and pH/ORP probes

Stores over 49000 data sets time and date stamped


Water Quality



Quantity must be 1 or more
Equipment available for both rental and purchase
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Technical Specifications

Buffer RecognitionYes
Connectivity / CommunicationsRS-232 Serial
ConnectorMS (military spec) waterproof with bayonet lock
GLP ComplianceYes
Graphic DisplayGraphic
Measurement RangeDissolved Oxygen-0 to 500% air saturation/0 to 50 mg/L, Temperature--5 to 45°C, Conductivity-0 to 200 mS/cm, Salinity-0 to 70 ppt, pH-0 to 14 units, ORP --1999 to +1999 mV, (auto range), Total Dissolved Solids (TDS)-0 too 100 g/L, Barometer -500 to 800 mmHg
Parameters MeasuredDissolved Oxygen, pH, Conductivity, Temperature, ORP
Poweroptional rechargeable pack, 4 alkaline C-cells
Unit of MeasureTotal Dissolved Solids (TDS)-g/L, ORP-mV, Temperature-°C, Barometer -mmHg, Salinity-ppt, Conductivity-mS/cm, mg/L, pH- units, Dissolved Oxygen-% air saturation
User CalibratableYes
User ReplaceableYes


W x L4.7 x 9\"\"119mm x 229mm


W x L2.1 lbs0.91 kg
Manuals, Data Sheets & Software