YSI 550A DO Instrument with 25’ cable YSI 550A-25
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YSI® 550A DO Instrument

Provides fast response times!

Availability: In Stock
Stock Number: 76355
  • Price:
  • $831.25
  • Description
  • Specifications
  • Reviews
  • Q&A
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Energizer C cell Alkaline Battery, Single

The rugged, waterproof YSI 550A measures dissolved oxygen and temperature simultaneously using polarographic technology and YSI Temperature Precision™ thermistors. The new PE membranes allow for faster response times with less stirring dependence. Measurements are fast and easy with one-handed operation, easy-to-use backlit display, automatic push-button calibration, and a weighted, quick-sinking probe. Other features include field-replaceable DO electrode modules, waterproof housing (meets IP-67 specifications), impact-resistant case, 2,000+ hours battery life, screw-on cap membranes, calibration in either mg/L or % saturation, user-selectable temperature units (°C or °F), a built-in calibration chamber, low-battery indicator, and direct compensation for salinity, temperature, and altitude. CE compliant. Three-year warranty on the instrument. One-year warranty on the DO module.

Brand: YSI
MPN: 550A-12
UNSPSC: 41115611

Accuracy: 0% to 200%: ±2% air sat. or ±2% of reading, whichever is greater; 200% to 500%: ±6% of reading; 0 to 20 mg/L: ±0.3 mg/L or ±2% of reading, whichever is greater; 20 to 50 mg/L: ±6% of reading; ±0.3°C. Range: 0% to 500% air saturation; 0 to 50 mg/L; -5°C to 45°C. Resolution: 0.1% air saturation or 1% selectable; 0.01 mg/L or 0.1 mg/L selectable; 0.1°C. Altitude compensation: yes. Salinity compensation: yes. Temperature: Auto compensation. Power: 4 C cell batteries. Battery life: over 2,000 hours. Dimensions: 4.7”W x 9”L.
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Options and Accessories – See Less

YSI Softside Carry Case

Item#: 76348
  • Price:
  • $99.75
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YSI Replacement Polarographic DO Sensor

For use with YSI® 556 Multi-Probe System and YSI® 550A DO Instrument

Item#: 76347
  • Price:
  • $185.25
Add To Cart

YSI DO Cap Membrane Kit for Polarographic Sensor

For compatible YSI® Dissolved Oxygen Meters. Cap membrane kit 1.25 mil PE (6 each), includes electrolyte.

Item#: 76359
  • Price:
  • $57.00
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Energizer C cell Alkaline Battery, Single

Item#: 2181
  • Quantity
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  • 6+
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