550A Dissolved Oxygen Instrument

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
    Certification 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

    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
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