YSI Model 550 Handheld Dissolved Oxygen Meter
YSI Model 550 Handheld Dissolved Oxygen Meter

YSI Model 550 Handheld Dissolved Oxygen Meter

Pine Item #51640

Looking for a rugged, field worthy instrument for measuring dissovled oxygen? The new YSI 550A Dissolved Oxygen instument features a waterproof (IP-67), impact-resistant case and innovative field-replaceable dissolved oxygen electrode modules. Measure dissovled Oxygen and temperature simultaneously using YSI's proveb polarographic technology for oxygen and YSI temperature precision thermistors, the planetwide standard for accuracy. The new PE membranes provide faster response times with less stirring dependence - saving time with every reading!


3.5 and 7.5m cable lengths

Calibrate in either mg.L or % saturation

Faster reponse time

Manual salinity input from 0 to 70ppt

Over 2000 hours battery life

Screw-on cap membranes - PE membranes lessen stirring dependence

User-selectable temperature units (?C or ?F)

Quantity must be 1 or more
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Technical Specifications

MediumFresh sea or polluted air
Range0 to 500% air saturation
Resolution0.1% air saturation or 1% selectable
Accuracy0-200% : ±2% air sat. or ±2% of reading whichever is greater 200-500% : ±6% of reading
Dissolved Oxygen SensorSteady-state polarographic
Dissolved Oxygen ProbeField-replaceable module
Temperature UnitsCelsius or Fahrenheit user selectable
Temperature SpecificationRange: *5 to +45°C Resolution: 0.1°C Accuracy: ±0.3°C
Parameter CompensationAutomatic temperature compensation for dissolved oxygen Automatic salinity compensation (0-70ppt) for dissolved oxygen Altitude compensati
Power4 alkaline C cells
Battery LifeOver 2000 hours at 25°C
Cables12 to 25 foot lengths (3.6m and 7.6m)
Other FeaturesWaterproof to IP-67 High-impact resistance Push-button calibrator Built-in calibration chamber Large backlit display Low battery indicator


W x L4.7 x 9\"\"119mm x 229mm


W x L2 lbs 0.91 kg
Manuals & Data Sheets