YSI 550 DO Instrument

True Field Performance
Looking for a rugged, field-worthy instrument for measuring dissolved oxygen? The new YSI 550 DO features a waterproof, impact-resistant case and innovative field-replaceable DO electrode modules. Measure dissolved oxygen and temperature simultaneaously using YSI's proven polarographic technology for oxygen and YSI Precision thermistors, the worldwide standard for accuracy.

• Waterproof! Meets IP67 specifications
• Field-replaceable DO electrode modules
• Screw-on cap membranes
• Over 2000 hours battery life
• Calibrate in either mg/L or % saturation
• User-selectable temperature units (°C or °F)
• 12- and 25-foot cable lengths
• Three-year warranty on the instrument and one-year on the DO module!

Packed with features Measurements are fast and easy with one-hand operation, an easy-to-use backlit display, low battery indicator, automatic push-button calibration, and a weighted, quick-sinking probe. The YSI 550 DO has a built-in calibration chamber, direct salinity, and altitude compensation. The instrument provides simultaneously readings of oxygen and temperature. Dissolved oxigen readings are automatically compensated for temperature.

Specifications

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• Range: 0 to 200% air saturation 0 to 20 mg/L
• Resolution: 0.1% air saturation 0.01 mg/L
• Accuracy ±2% air saturation or ±2% of reading, whichever is greater ±0.3 mg/L or ±2% or reading, whichever is greater
• Dissolved Oxygen Sensor: Steady-state polarographic
• Dissolved Oxygen Probe: Field-replaceable module
• Temperature units: Celsius or fahrenheit, user selectable
• Temperature specifications Range: -5 to 45°C Resolution: 0.1°C Accuracy: ±0.3°C
• Parameter compensation: Automatic temperature compensation for dissolved oxygen, automatic salinity compensation for dissolved oxygen, altitude compensation for calibration
• Size: 4.7 in. width; 9 in. length (11.9 cm x 22.9 cm)
• Weight with batteries: 2 lb (0.91 kg)
• Power: 4 alkaline C cell
• Battery life: Over 2000 hours at 25°C
• Cables: 12 or 25 foot lengths
• Other features
  • Waterproof to IP67
  • High impact resistance
  • Push-button calibration
  • Built-in calibration chamber
  • Large, backlit display
  • Low battery indicator on display
  • CE compliance
• Warranty: 3-year for the instrument
• 1-year for the DO module

Easy to use YSI 559 Replacement Dissolved Oxygen electrode modules enable quick changes in the field. Simply detach the safety cap, then unscrew and replace the DO electrode. It's fast, easy, and requires no training.

GENEQ Inc., 8047 Jarry St. E., Montreal, PQ H1J 1H6. Tel: 514-354-2511; Fax: 514-354-6948.