YSI™ Model 550A Dissolved Oxygen Meter

Rugged DO Meter designed for the field

Brand: YSI™

Manufacturer Part Number: 550A25CC


UNSPSC: 41115611

Code: 04

Additional Details:
Additional Details: Weight: 0.80000kg

Product Code. 11974366


This item has been discontinued and is no longer available. View the product for possible alternatives or contact our Product Support team on 01509 555888 for assistance

  • Description and Specification
  • Accessories and Spare Parts
Description and Specification


Includes Meter, DO/temperature probe, 4 C Batteries, Cable, Carrying Case
Sensor Types Thermistor
Resolution (Temperature) 0.1°C
Accuracy (Temperature) ±0.3°C
Battery Life 2000 hr.
Battery Type C Alkaline
IP Rating 67
Certifications/Compliance CE, IP67
Weight (Metric) 0.91kg
Accuracy (DO) 0 to 20mg/L, ±0.3mg/L or 2% of reading, whichever is greater, 20 to 50mg/L, ±6% of reading
Dimensions (L x W) 9 x 4.75 in. (23 x 12cm)
For Use With (Application) DO, Temperature
Length (Metric) 23cm
Range (DO) 0 to 50mg/L
Resolution (DO) 0.01, 0.1mg/L
Saturation Range 0 to 500% Air Saturation
Saturation Resolution 0.1% Air Saturation
Width (Metric) 12cm
Warranty 3 Years

  • 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

Accessories and Spare Parts