YSI 550A Dissolved Oxygen Instrument
Price range: $35.00 through $550.00
Measure dissolved oxygen and temperature simultaneously using YSI’s proven polarographic technology for oxygen and YSI Temperature Precision™ thermistor.
Rental Rates:
| Daily | Weekly | Monthly |
| $35 | $160 | $550 |
- Faster response time
- Waterproof! Meets IP-67 specifications
- Field-replaceable DO electrode modules
- Screw-on cap membranes
- PE membranes lessen stirring dependence
- Over 2000 hours battery life
- Calibrate in either mg/L or % saturation
- User-selectable temperature units (°C or °F)
- 25-foot cable length
- Manual salinity input from 0 to 70 ppt
Dissolved Oxygen % Saturation:
- Range: 0 to 500%
- Resolution: 0.1% air saturation or 1%; selectable
- Accuracy: 0 to 200%: ±2% of reading or 2% air saturation, whichever is greater; 200 to 500%: ±6% of reading
Dissolved Oxygen mg/L
- Range: 0 to 50 mg/L
- Resolution: 0.01 mg/L or 0.1 mg/L; selectable
- Accuracy: 0 to 20 mg/L: ± 0.3 mg/L or 2% of reading, whichever is greater; 20 to 50 mg/L: ±6% of reading
Temperature (°C or °F)
- Range: -5 to +45°C
- Resolution: 0.1°C
- Accuracy: ±0.3°C
Medium: Fresh, sea, or polluted water
Dissolved Oxygen Sensor: Steady-state polarographic
Dissolved Oxygen Probe: Field-replaceable module
Parameter Compensation:
- Automatic temperature compensation for dissolved oxygen
- Automatic salinity compensation (0-70 ppt) 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 cells
Battery Life: Over 2000 hours at 25°C