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YSI 556 MPS Multiparameter Water Quality Meter

SKU: CP103567
Model: 556 MPS
Product Condition: Certified Pre-owned
$999.95

YSI 556 MPS handheld multiparameter water quality meter with probe and field cable for dissolved oxygen, conductivity, temperature, pH, and ORP measurement.

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Estimated delivery: 3 days
One year warranty
Free return within 30 days of purchase.
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Product Description

Multiparameter measurement of water quality in field sampling

Water testing in the field often requires more than one measurement at the same location. Dissolved oxygen, conductivity, temperature, pH, and oxidation-reduction potential must be collected with the same instrument and recorded with consistent time and date information. This handheld multiparameter meter combines those functions in one field instrument with a connected probe and onboard data logging.

The YSI 556 MPS is a handheld multiprobe system for water quality measurement. Manufacturer literature identifies the platform as a multiparameter handheld instrument with logging memory, RS-232 communication, field-replaceable electrodes, and a waterproof IP-67 case. The provided unit photos show a probe configuration with dissolved oxygen, conductivity, temperature, pH, and ORP enabled on the instrument screen.

Simultaneous Sensor Measurement and Data Logging

  • Measures dissolved oxygen, conductivity, and temperature as part of the 556 MPS platform.
  • Supports pH and ORP measurement with optional probe configurations; both are enabled on the pictured unit.
  • Uses a menu-based handheld interface for sensor setup, calibration, run mode, and file handling.
  • Stores up to 49,000 data sets with date and time stamp for manual or interval logging.
  • Connects to a PC through an RS-232 serial interface for data upload.

Menu-Driven Calibration and Field Operation

Operation is handled through the instrument keypad and menu structure. The quick-start guide describes sensor enablement, report parameter selection, calibration routines, logging, and file upload. The included probe and field cable connect the handheld meter to the sensing assembly, while the transportation and calibration cup supports calibration and handling during routine use.

Field Sampling and Water Quality Data Collection

  • Field measurement of dissolved oxygen, conductivity, temperature, pH, and ORP in water samples.
  • Manual or interval data logging with stored files for later transfer to a PC.
  • Portable water quality testing where a handheld multiparameter instrument is required.
Specifications
Specifications
MPN 556 MPS
Product Condition Certified Pre-owned
Shipping Length (in.) 18
Shipping Width (In.) 16
Shipping Height (In.) 10
Condition Type Certified Pre-Owned
Item Returns This item can be returned
Brand YSI
Model 556 MPS
Instrument Type Multiparameter handheld water quality meter
Dissolved Oxygen Sensor Type Steady state polarographic
Dissolved Oxygen (% Saturation) Range 0 to 500% air saturation
Dissolved Oxygen (% Saturation) Accuracy 0 to 200% air saturation, ±2% of reading or ±2% air saturation, whichever is greater; 200 to 500% air saturation, ±6% of reading
Dissolved Oxygen (% Saturation) Resolution 0.1% air saturation
Dissolved Oxygen (mg/L) Range 0 to 50 mg/L
Dissolved Oxygen (mg/L) Accuracy 0 to 20 mg/L, ±2% of reading or ±0.2 mg/L, whichever is greater; 20 to 50 mg/L, ±6% of reading
Dissolved Oxygen (mg/L) Resolution 0.01 mg/L
Temperature Sensor Type YSI Temperature Precision thermistor
Temperature Range -5 to 45°C
Temperature Accuracy ±0.15°C
Temperature Resolution 0.1°C
Conductivity Sensor Type 4-electrode cell with autoranging
Conductivity Range 0 to 200 mS/cm
Conductivity Accuracy ±0.5% of reading or ±0.001 mS/cm, whichever is greater (4 m cable); ±1.0% of reading or ±0.001 mS/cm, whichever is greater (20 m cable)
Conductivity Resolution 0.001 mS/cm to 0.1 mS/cm (range-dependent)
Salinity Range 0 to 70 ppt
Salinity Accuracy ±1.0% of reading or ±0.1 ppt, whichever is greater
Salinity Resolution 0.01 ppt
pH Sensor Type Glass combination electrode
pH Range 0 to 14 units
pH Accuracy ±0.2 units
pH Resolution 0.01 units
ORP Sensor Type Platinum button
ORP Range -999 to +999 mV
ORP Accuracy ±20 mV
ORP Resolution 0.1 mV
Total Dissolved Solids Calculated from conductivity (variable constant, default 0.65)
Total Dissolved Solids Range 0 to 100 g/L
Data Logger 49,000 data sets with date and time stamp, manual or logging, with user-selectable save rate
Communication Port RS-232 serial
Power 4 alkaline C-cells; optional rechargeable pack
Ingress Protection IP-67
Instrument Size 4.7 in W x 9 in L
Instrument Weight 2.1 lb with batteries
Warranty (OEM Published) 3-year for the instrument; 1-year for the probes and cable
What's in the box?
  • 1 x YSI 556 MPS handheld meter
  • 1 x Multiparameter probe with field cable
  • 1 x Perforated sensor guard
  • 1 x Transportation / calibration cup with cap
  • 5 x Black membrane cap assemblies
  • 2 x Blue membrane cap assemblies
  • 1 x Krytox GPL 205 lubricant
  • 2 x O-ring flow cell replacements (12103028)
  • 1 x YSI 5061 large carrying case
  • 1 x Shoulder strap
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