YSI Model 556 MPS

Handheld Multiparameter Water Quality Meter

The YSI 556 MPS simultaneously measures and displays pH, dissolved oxygen, conductivity, ORP, and temperature. Salinity or total dissolved solids can also be displayed instead of conductivity. Features like field replaceable electrodes and screw on cap style DO membranes allow the 556 to lower the cost of ownership while at the same time replacing many different instruments with one, fully featured and rugged, handheld unit. Advanced features like datalogging, graphing, GLP assistance, and multiple language capabilities are all standard. Options lilke a built in barometer for DO calibrations, rechargeable battery packs, and a flow cell are also available.

YSI’s new Professional Plus multiparameter meter offers all the advantages of the 556 MPS with increased versatility and probe options. Many different cables for different probe combinations and additional probe options are available.

Every 556 includes YSI’s EcoWatch software for data analysis and retrieving data from the instrument. The standard datalogging has enough memory to store 49,000 points of data and can log either manually or at preprogrammed intervals. PC connection is handled through an RS2323 serial interface with the included cable.

Reliable and accurate measurements are obtained by YSI’s polarographic DO sensor, 4 electrode conductivity cell, a glass combination cell for pH, a platinum button for ORP, and YSI’s temperature precision thermistor. Conductivity readings are automatically temperature compenstated and DO readings are compenstated for salinity. The optional internal barometer can be user calibrated and is used for DO calibrations or for logging changes in barometric pressure.

The YSI 556 MPS is field rugged with an IP67 rate waterproof and impact resistant enclosure. Both the cables and all the electrodes are field replaceable, removing the need to send the unit in for service with damaged cables or sensors. Designed for the toughest environments, even the dispaly automatically adjusts its contrast for temperature conditions. The 556 can be powered from either 4 C alkaline batteries or from an optional rechargeable battery pack. Runtime is 180 hours from alkaline batteries and 50 hours from the rechargeable battery pack. The battery pack can be recharged while still installed in the instrument.

556 MPS Features

  • Simultaneously measures and displays pH, DO, conductivity, ORP, and temperature
  • Can calculate salinity and total dissolved solids
  • electrodes and cables are user replaceable
  • Optional internal barometer
  • Optional rechargeable battery packs
  • Datalogging standard
  • EcoWatch software compatible
  • Assists with GLP (good lab practices)
  • Easily replaceable screw on DO membranes
  • User upgradable firmware
  • IP67 rated waterproof enclosure
  • Cables available in multiple lengths up to 20 meters

What to Order

A complete YSI 556 MPS multiparameter meter system consists of the instrument and a cable assembly purchased separately. The measurement of pH and/or ORP requires the additional purchase of either a pH probe or a combination pH/ORP probe. The instrument is available below with or without an internal barometer, and includes accesories and a carrying case.

Cable assemblies are available in lengths of 4, 10, or 20 meters. Every cable assembly includes a DO probe, conductivity/temp probe, and all the necessary accessories for operation, calibration, and maintenance. pH and pH/ORP probes are available for installation into the cable assembly, but the instrument can be operated without them if desired.

Additional accessories like flow cells, replacement probes, extra DO membranes, a rechargeable battery kit, and various carrying cases are also listed below.

YSI 556 MPS Multiparameter Meter

Call to Order
1-888-234-5678

Part No. Description Price
556-01 YSI 556 MPS1, instrument only2 $1,795.00 $1,705.25
556-02 YSI 556 MPS1 with internal barometer, instrument only2 $2,050.00 $1,947.50
  • 1 Includes: YSI 556 instrument, soft sided carrying case, pc interface cable, 4 C alkaline batteries, quick start guide, and a user manual on CD-ROM
  • 2 Requires cable assembly and probes for pH and/or ORP measurements

YSI 556 Cable Assemblies

Call to Order
1-888-234-5678

Part No. Description Price
5563-4 Cable assembly12 for YSI 556 MPS, 4 meter $995.00 $945.25
5563-10 Cable assembly12 for YSI 556 MPS, 10 meter $1,095.00 $1,040.25
5563-20 Cable assembly12 for YSI 556 MPS, 20 meter $1,195.00 $1,135.25
  • 1 Includes: cable assembly, calibration cup, probe guard/weight, p/n 005560 conductivity/temperature probe, p/n 655900 DO probe, p/n 605307 cap membrane kit, and p/n 005511 maintenance kit
  • 2 pH and/or ORP measurements require a seperate probe purchase

YSI 556 Probes

Call to Order
1-888-234-5678

Part No. Description Price
005564 pH probe1 for YSI 556 MPS $250.00 $237.50
005565 pH/ORP probe1 for YSI 556 MPS $350.00 $332.50
655900 Replacement DO probe24 for YSI 556 MPS $189.00 $179.55
005560 Replacement conductivity/temperature probe34 for YSI 556 MPS $420.00 $399.00
  • 1 Includes: electrode, storage bottle, storage solution, and instructions
  • 2 Includes: sensor and instructions
  • 3 Includes: sensor, installation tool, and instructions
  • 4 For replacement, included with all cable assemblies

YSI 556 MPS Replacement DO Membranes

Call to Order
1-888-234-5678

Part No. Description Price
605307 Replacement membranes1 for YSI 556 MPS
Blue cap 2.00 Mil Polyethylene		 $57.00 $54.15
605306 Replacement membranes1 for YSI 556 MPS
Yellow cap 1.25 Mil Polyethylene		 $54.00 $51.30
059880 Replacement membranes1 for YSI 556 MPS
Black cap 1.00 Mil Teflon		 $54.00 $51.30
  • 1 Includes: 6 screw on cap membranes, sanding disk, electrolyte solution, and instructions

YSI 556 MPS Calibration Solutions

Our entire line of calibration solutions are available in the field supplies section

Call to Order
1-888-234-5678

Part No. Description Price
PH-COMBO-PK EQUIPCO pH solution for YSI 556 MPS
6 individual 500 mL bottles, 2 each of pH 4, 7, and 10		 $60.00 $57.00
603824 YSI pH solution for YSI 556 MPS
6 individual 1 pint (~473 mL) bottles,2 each of pH 4, 7, and 10		 $79.00
003821 YSI pH solution for YSI 556 MPS
6 individual 1 pint (~473 mL) bottles,pH 4		 $79.00
003822 YSI pH solution for YSI 556 MPS
6 individual 1 pint (~473 mL) bottles,pH 7		 $79.00
003823 YSI pH solution for YSI 556 MPS
6 individual 1 pint (~473 mL) bottles,pH 10		 $79.00
COND-1K-500ML EQUIPCO conductivity solution for YSI 556 MPS
500 mL bottle, 1000 µS		 $16.00 $15.20
COND-58K-500ML EQUIPCO conductivity solution for YSI 556 MPS
500 mL bottle, 58700 µS		 $16.00 $15.20
065270 YSI conductivity solution for YSI 556 MPS
1 quart (~946 mL), 1000 µS		 $68.00
065272 YSI conductivity solution for YSI 556 MPS
1 quart (~946 mL), 10000 µS		 $68.00
065274 YSI conductivity solution for YSI 556 MPS
1 quart (~946 mL), 100000 µS		 $68.00
060907 YSI conductivity solution for YSI 556 MPS
8 individual 1 pint (~473 mL) bottles, 1000 µS		 $118.00
060911 YSI conductivity solution for YSI 556 MPS
8 individual 1 pint (~473 mL) bottles, 10000 µS		 $118.00
060660 YSI conductivity solution for YSI 556 MPS
8 individual 1 pint (~473 mL) bottles, 50000 µS		 $118.00
ORP-500ML EQUIPCO ORP solution for YSI 556 MPS
500 mL bottle, Zobell solution		 $95.00 $90.25
061320 YSI ORP solution for YSI 556 MPS
125 mL bottle, Zobell solution		 $29.00
005580 YSI confidence solution for YSI 556 MPS
6 individual 1 pint (~473 mL) bottles		 $98.00

YSI 556 MPS Accessories

Call to Order
1-888-234-5678

Part No. Description Price
005083 Flow cell for YSI 556 MPS, 500 mL $395.00 $375.25
603059 Flow cell for YSI 556 MPS, 203 mL $320.00 $304.00
655277 Rechargeable battery pack kit1 for YSI 556 MPS $350.00 $332.50
063516 Vehicle charger2 for YSI 556 MPS $23.00 $21.85
655227 Hands free harness for YSI 556 MPS $30.00 $28.50
655259 Carrying case for YSI 556 MPS, vinyl with shoulder strap $38.00 $36.10
603074 Carrying case for YSI 556 MPS, hard sided $260.00 $247.00
606930 Carrying case for YSI 556 MPS, large hard sided $325.00 $308.75
063517 Ultra clamp3 for YSI 556 MPS $25.00 $23.75
063507 Tripod4 for YSI 556 MPS $28.00 $26.60
  • 1 Includes: rechargeable battery pack, cable adapter, and universal charger
  • 2 requires p/n 655277
  • 3 Allows the instrument to be mounted to a desk, boat, etc...
  • 4 Allows the instrument to stand on any flat surface

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