YSI™ Model 55 Handheld Dissolved Oxygen Meter

With easy-to-use, push-button calibration

Manufacturer: YSI™ 055250

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Catalog No. 13-298-62


This item has been discontinued by the manufacturer and is no longer available. Please call customer service for assistance: 1-800-766-7000. 


    Includes Rugged, floatable ABS case, probe and 50 ft. cable
    Sensor Types TDS
    Resolution (Temperature) 0.1°C
    Accuracy (Temperature) ±0.4°C
    Display Type LCD
    Battery Life 100 hr.
    Battery Type AA Alkaline
    IP Rating 65
    Certifications/Compliance CE, IP65
    Weight (English) 1.7 lb.
    Weight (Metric) 0.77kg
    Accuracy (DO) ±0.3mg/L
    For Use With (Application) DO
    Height (English) 9.5 in.
    Height (Metric) 24cm
    Length (English) 2.5 in.
    Length (English) Cable 50 ft.
    Operating Limits Ambient Temperature Range -10° to 50 °C
    Range (DO) 0 to 20mg/L
    Resolution (DO) 0.01mg/L
    Saturation Range 0 to 200% Air Saturation
    Saturation Resolution 0.1% Air Saturation
    Temperature (English) Range 23° to 113°F
    Voltage 9VDC
    Width (English) 3.5 in.
    Width (Metric) 8.9cm
    Warranty 2 Years

    Lightweight, handheld unit is a complete system for measuring dissolved oxygen.

    Easy to calibrate and operate:

    • Place probe inside built-in calibration chamber
    • Push both arrow buttons simultaneously
    • Indicate altitude and salinity
    • Place stainless-steel probe in sample; probe sinks easily for measuring convenience
    • Six AA alkaline batteries supply power for approximately 100 hours of operation
    Accurate measurement and compensation:
    • Simultaneously displays oxygen and temperature
    • 0 to 20mg/L dissolved oxygen range; accurate to ±0.3mg/L
    • 0 to 200% air saturation range; accurate to ±2%
    • Measures temperature from -5° to +45°C (23° to 113°F)
    • Direct salinity compensation of 0 to 40ppt range means you can use meter in fresh or salt water

  • Description & Specifications
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