55 Dissolved Oxygen Instrument

The YSI model 55 dissolved oxygen instrument has been discontinued. YSI will continue to support existing model 55's through 2020. We recommend the Pro20i as a direct replacement. The Pro20 and ProSolo handheld instruments are also suitable replacements.

• Overview

  Offering 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.

  Features:

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

• Specifications

  Certification	IP-65 (water resistant), CE compliant
  Graphic Display	Graphic, backlit display
  Logging Capabilities	Single
  Measurement Range	Dissolved Oxygen-0 to 200% air saturation/0 to 20 mg/L, Temperature--5 to 45°C
  Parameters Measured	Dissolved Oxygen, Temperature
  Power	2 alkaline C-cells provide 400 continuous hours at ambient temperature without backlight
  Sampling	Yes
  Unit of Measure	Dissolved Oxygen-% air saturation, Temperature-°C, mg/L
  User Calibratable	Yes
  Warranty	2-year instrument
  Waterproof	IP-65 (water resistant)

• Manuals
  • Français - YSI 55 Manuel d’utilisation
  • YSI 55 Operations Manual
  • Español - YSI 55 Manual de Usario