550A Dissolved Oxygen Instrument

550A Dissolved Oxygen Instrument

YSI model 550A Dissolved Oxygen Meter.

PriceDiscontinued

Option

SKU550A-12


The 550A dissolved oxygen instrument has been discontinued. YSI will continue to support existing 550A's through 2020. We recommend the Pro20i as a direct replacement. The Pro20 and ProSolo handheld instruments are also suitable replacements.

  • Overview

    Features:

    • Field-replaceable DO electrode modules
    • Screw-on cap membranes
    • IP-67 case
    • Over 2000 hours battery life
    • Calibrate in either mg/L or % saturation

    Do you have an old meter such as the 550A that you'd like to trade in for a discount on a new ProSolo ODO/T system? Check out the Pro Series Trade-In Promotion going on now (U.S. only).

    Be the envy of your co-workers by winning a ProSolo ODO/T system! Enter to win a ProSolo optical DO system.

    Please visit our extensive dissolved oxygen resource page to learn about all things DO and BOD related.

    You can also download The Dissolved Oxygen Handbook - the definitive guide on all things DO.

  • Specifications
    Certifications High-impact resistance, IP-67, CE
    Graphic Display Graphic
    Measurement Range Dissolved Oxygen-0 to 500% air saturation/0 to 50 mg/L, Temperature--5 to 45°C
    Multiparameter Yes
    Parameters Measured Dissolved Oxygen, Temperature
    Power Low battery indicator on display, Over 2000 hours at 25°C, 4 alkaline C-cells
    Sampling Yes
    Unit of Measure Dissolved Oxygen-% air saturation, Temperature-°C, mg/L
    User Calibratable Yes
    User Replaceable Yes
    Warranty 3-year instrument; 1-year DO module
    Waterproof floats, IP-67 (even with the battery cover off)
  • Accessories

    Cap Membrane Kit 1.25 Mil PE

    Cap Membrane Kit 1.25 Mil PE (6 each), Polarographic, includes electrolyte (yellow cap)

    DO Replaceable Probe

    DO Replaceable Probe

    Carrying Case, Small Soft-sided (instrument & cable)

    Carrying Case, Small Soft-sided (instrument & cable), Pre-cut foam/Nylon fabric (11.5 x 14.5 x 6)

    Probe Reconditioning Kit for 5239, Model 550A

    Probe Reconditioning Kit (400 grit sanding discs and sanding tool)

  • How to Order

    Step 1: Order Instrument and Cable/Probe Assembly

    SKU Description
    550A-12, 25, 50 or 100 Instrument with 12, 25, 50 or 100-foot cable and probe
    550A-12CC, 25CC, 50CC, or 100CC Instrument with 12, 25, 50 or 100-foot cable and probe with carrying case

    Step 2: Order Accessories

    SKU Description
    5908 Membrane kit, 1.25 mil PE (6 caps and bottle of KCl)
    559 User-replaceable DO electrode
  • Video

    550A Dissolved Oxygen Instrument

    YSI model 550A Dissolved Oxygen Meter.

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