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YSI™ Model 550A Dissolved Oxygen Meter
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Length (English) Cable:
12 ft.
25 ft.
Description
Includes
Four C batteries, DO/temperature probe, cable; available with and without carrying case
- Accurate measurement of dissolved oxygen and temperature simultaneously
- Waterproof, impact-resistant case
- Innovative field-replaceable DO electrode with screw-on cap membranes
- Quick sinking, weighted probe
- Large easy-to-read backlit display
- Features calibration in % and mg/L, altitude and temperature compensation, and a low battery indicator
Order Info
Available with 12–, 25–, 50–, and 100 ft. cables. Replacement DO electrode sold separately. Dimensions: 9L x 4 3/4 x 2 1/2 in.H (23 x 12 x 6cm).
Certifications
CE marked CE compliant
Compliance
Meets IP67 requirements
Warranty and Services
Three-year warranty on instrument and one-year warranty on replaceable electrode

Specifications
Specifications
Includes | Meter, DO/temperature probe, 4 C Batteries, Cable |
For Use With (Application) | DO, Temperature |
Sensor Types | Thermistor |
Resolution (Temperature) | 0.1°C |
Accuracy (Temperature) | ±0.3°C |
Certifications/Compliance | CE, IP67 |
IP Rating | IP-67 |
Weight (Metric) | 0.91 kg |
Weight (English) | 2 lb. |
Warranty | 3 Years |
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