YSI Model 556 MPS

Handheld Multiparameter Water Quality Meter

YSI Model 556 MPS - Handheld Multiparameter Water Quality Meter

The YSI 556 has been discontinued and replaced by the Professional Plus. Refurbished instruments are available, please call for more information. New replacement probes and instrument service will continue to be offered.

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

YSI 556 Water Quality Meter

  • Part Number/Description
  • Price
  • YSI556MPSYSI 556
    Refurbished by factory authorized service center
  • Call to Order

YSI 556 MPS Cable Assemblies

  • Part Number/Description
  • Price
  • 5563-4Cable assembly12 for YSI 556 MPS, 4 meter
  • $1,071.00
  • 5563-10Cable assembly12 for YSI 556 MPS, 10 meter
  • $1,170.00
  • 5563-20Cable assembly12 for YSI 556 MPS, 20 meter
  • $1,275.00

YSI 556 MPS Probes

  • Part Number/Description
  • Price
  • 005564pH probe1 for YSI 556 MPS
  • $275.00
  • 005565pH/ORP probe1 for YSI 556 MPS
  • $365.00
  • 655900Replacement DO probe24 for YSI 556 MPS
  • $195.00
  • 005560Replacement conductivity/temperature probe34 for YSI 556 MPS
  • $430.00

YSI 556 MPS Replacement DO Membranes

  • Part Number/Description
  • Price
  • 605307Replacement membranes1 for YSI 556 MPS
    Blue cap 2.00 Mil Polyethylene
  • $60.00 $57.00
  • 605306Replacement membranes1 for YSI 556 MPS
    Yellow cap 1.25 Mil Polyethylene
  • $60.00 $57.00
  • 059880Replacement membranes1 for YSI 556 MPS
    Black cap 1.00 Mil Teflon
  • $60.00 $57.00

YSI 556 MPS Calibration Solutions

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

  • Part Number/Description
  • Price
  • PH-COMBO-PKEQUIPCO pH solution for YSI 556 MPS
    6 individual 500 mL bottles, 2 each of pH 4, 7, and 10
  • $60.00 $57.00
  • 603824YSI pH solution for YSI 556 MPS
    6 individual 1 pint (~473 mL) bottles,2 each of pH 4, 7, and 10
  • $80.00
  • 003821YSI pH solution for YSI 556 MPS
    6 individual 1 pint (~473 mL) bottles,pH 4
  • $80.00
  • 003822YSI pH solution for YSI 556 MPS
    6 individual 1 pint (~473 mL) bottles,pH 7
  • $80.00
  • 003823YSI pH solution for YSI 556 MPS
    6 individual 1 pint (~473 mL) bottles,pH 10
  • $80.00
  • COND-1K-500MLEQUIPCO conductivity solution for YSI 556 MPS
    500 mL bottle, 1000 µS
  • $16.00 $15.20
  • COND-10K-500MLEQUIPCO conductivity solution for YSI 556 MPS
    500 mL bottle, 10,000 µS
  • $16.00 $15.20
  • 065270YSI conductivity solution for YSI 556 MPS
    1 quart (~946 mL), 1000 µS
  • $72.00
  • 065272YSI conductivity solution for YSI 556 MPS
    1 quart (~946 mL), 10000 µS
  • $72.00
  • 065274YSI conductivity solution for YSI 556 MPS
    1 quart (~946 mL), 100000 µS
  • $72.00
  • 060907YSI conductivity solution for YSI 556 MPS
    8 individual 1 pint (~473 mL) bottles, 1000 µS
  • $124.00
  • 060911YSI conductivity solution for YSI 556 MPS
    8 individual 1 pint (~473 mL) bottles, 10000 µS
  • $124.00
  • 060660YSI conductivity solution for YSI 556 MPS
    8 individual 1 pint (~473 mL) bottles, 50000 µS
  • $124.00
  • ORP-500MLEQUIPCO ORP solution for YSI 556 MPS
    500 mL bottle, Zobell solution
  • $95.00 $90.25
  • 061320YSI ORP solution for YSI 556 MPS
    125 mL bottle, Zobell solution
  • $33.00
  • 005580YSI confidence solution for YSI 556 MPS
    6 individual 1 pint (~473 mL) bottles
  • $104.00

YSI 556 MPS Accessories

  • Part Number/Description
  • Price
  • 005083Flow cell for YSI 556 MPS, 500 mL
  • $400.00
  • 603059Flow cell for YSI 556 MPS, 203 mL
  • $335.00
  • 655277Rechargeable battery pack kit1 for YSI 556 MPS
  • $360.00
  • 063516Vehicle charger2 for YSI 556 MPS
  • $27.00
  • 655227Hands free harness for YSI 556 MPS
  • $35.00
  • 655259Carrying case for YSI 556 MPS, vinyl with shoulder strap
  • $47.00
  • 603074Carrying case for YSI 556 MPS, hard sided
  • $285.00
  • 606930Carrying case for YSI 556 MPS, large hard sided
  • $335.00
  • 063517Ultra clamp3 for YSI 556 MPS
  • $25.00
  • 063507Tripod4 for YSI 556 MPS
  • $30.00

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