YSI™ Model 55 Handheld Dissolved Oxygen Meter

With easy-to-use, push-button calibration

Manufacturer: YSI™ 055250

 View more versions of this product

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
  • Accessories

Related Products

Product Content Feedback

We continue to work to improve your shopping experience and your feedback regarding this content is very important to us. Please use the form below to provide feedback related to the content on this product.

Product Title

By clicking Submit, you acknowledge that you may be contacted by Fisher Scientific in regards to the feedback you have provided in this form. We will not share your information for any other purposes. All contact information provided shall also be maintained in accordance with our Privacy Policy.

Cancel Submit