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YSI 55 Dissolved Oxygen Meter

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Product Description

ffering push-button calibration with a built-in calibration chamber, direct salinity, and altitude compensation, the YSI 55 provides simultaneous readings of oxygen and temperature.

Dissolved oxygen readings are automatically compensated for temperature. Also available is the YSI 55D with a detachable cable.



  • Large, backlit display
  • 12, 25, or 50 foot cables
  • IP-65 water tight
  • Low-battery indicator
  • CE compliant

YSI 55 Instrument General Specifications

Altitude compensation 0 to 10,000 feet
Cables 12, 25, 50 feet (3.7, 7.62, 15.2 meters), available with detachable cable
Certifications IP-65 (water resistant); CE compliant
Display Backlit
Salinity Compensation Manual 0-40 ppt
Warranty 2-year instrument


YSI 55 System Specifications (Instrument with Cable & Probe)

Sensor Type Range Accuracy Resolution
Dissolved Oxygen (%) Steady-state Polarographic 0 to 200% air saturation ±2% saturation 0.1% air saturation
Dissolved Oxygen (mg/L) Steady-state Polarographic 0 to 20 mg/L ±0.3 mg/L 0.01 mg/L
Temperature Thermistor -5 to 45°C ±0.2°C 0.1°C


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