Pro20i Dissolved Oxygen Meter

Dissolved Oxygen Meter Comparison: Model 55 vs. Pro20 and Pro20i

The YSI Pro20i has replaced the discontinued YSI Model 55 dissolved oxygen handheld. This video reviews the Model 55 with the Pro20 and Pro20i, with the Pro20 offering a user-replacable cable, unlike the Pro20i and Model 55.

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Price$1,092.00 (US Only)

Option

SKU607130


In Stock 0 - Available for Backorder

The Pro20i is a handheld instrument for dissolved oxygen and temperature with an integral (non-detachable) cable. It is a direct replacement for the discontinued Model 55 and 550A instruments. Available YSI-compatible sensors are EPA-approved for reporting DO in wastewater compliance. Instrument, cables, probes/sensors included.

Explore the ProSolo for an optical dissolved oxygen handheld.

  • Order Meter
    SKU Description Price Quantity
    607130 Handheld with 1-meter integral (non-detachable) cable and 2003 Polarographic sensor kit $1,092.00
    607131 Handheld with 1-meter integral (non-detachable) cable and 2002 Galvanic sensor kit $1,092.00
    607125 Handheld with 4-meter integral (non-detachable) cable and 2003 Polarographic sensor kit $1,118.00
    607129 Handheld with 4-meter integral (non-detachable) cable and 2002 Galvanic sensor kit $1,118.00
    607132 Handheld with 10-meter integral (non-detachable) cable and 2003 Polarographic sensor kit $1,185.50
    607133 Handheld with 10-meter integral (non-detachable) cable and 2002 Galvanic sensor kit $1,185.50
  • Order Accessories
    SKU Description Price Quantity
    605306 5908 - Replacement Standard Membrane Kit for 605203 Polarographic DO sensor $79.25
    603075 3075 - Pro Series Soft Sided Carrying Case $160.50
    603070 3070 - Shoulder strap $39.25
    605913 5913 - Replacement Standard Membrane Kit for 605202 Galvanic DO sensor $81.25
    603074 3074 - Pro Series Hard Sided Carrying Case $371.00
    603162 6262 - Pro Series Soft Sided Small Carrying Case $116.50
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  • Overview

    The YSI Pro20i dissolved oxygen meter is a rugged, user-friendly instrument for measuring dissolved oxygen. Depending on your needs, you can choose between a user-replaceable Polarographic DO sensor or a Galvanic DO sensor.

    Top Features

    • Integral (built-in) field cable in 1, 4, and 10-meter variations with user-replaceable DO sensors
    • One Touch Cal for convenient and quick calibration
    • Choice of DO sensor (Polarographic or Galvanic
    • Military spec connectors, IP-67 waterproof, and 1-meter drop tested
    • Rubber over-molded case
    • Low total cost of ownership
    • Internal barometer for highest accuracy
    • 95% response in 8 seconds with standard membrane
    • Stores 50 data sets
    • Graphic, backlit display and glow-in-the-dark keypad visible with polarized sunglasses on
    • Multiple languages include English, Spanish, French, and German
    • 3-year instrument warranty; 2-year cable warranty; 1-year polarographic sensor warranty; 6-month galvanic sensor warranty

    For a user-replaceable (detachable) cable alternative, YSI offers the Pro20 handheld with various BOD probe and DO assemblies.

    Please visit our extensive dissolved oxygen resource page to learn about DO and BOD-related things: www.YSI.com/weknowDO.

    You can also download The Dissolved Oxygen Handbook, which covers all things DO-related, from technologies to maintenance and calibrations to acquiring the best data.

  • Specifications
    Cable Options 1- 4- 10-m lengths (3.28, 13.1, 32.8 ft.)
    Certifications RoHS, CE, WEEE, IP-67 waterproof, 1-meter drop test
    Languages English, Spanish, German, French
    Memory 50 data sets
    Power 2 alkaline C-cells providing ~400 hours of battery life (without backlight); low battery indicator when 1 hour is left
    Size

    8.3 cm width x 21.6 cm length x 5.6 cm depth (3.25 in. x 8.5 in. x 2.2 in.)

    Warranty

    3-year instrument; 2-year cable; 1-year polarographic sensors; 6-month galvanic sensors

    Weight 475 grams (1.05 lbs.) (with batteries)
  • Accessories

    Cap Membrane Kit 1.25 Mil PE

    Cap Membrane Kit 1.25 Mil PE (6 each), Galvanic, includes electrolyte (yellow cap)

    Cap Membrane Kit 1.25 Mil PE

    Cap Membrane Kit 1.25 Mil PE (6 each), Polarographic, includes electrolyte (yellow cap)

    Pro Series Galvanic Dissolved Oxygen Sensor

    YSI 2002 Galvanic Dissolved Oxygen sensor for the Pro Series

    Pro Series Polarographic Dissolved Oxygen Sensor

    YSI 2003 Polarographic Dissolved Oxygen sensor for the Pro Series (Yellow Membrane Kit)

  • Video

    Dissolved Oxygen Meter Comparison: Model 55 vs. Pro20 and Pro20i

    The YSI Pro20i has replaced the discontinued YSI Model 55 dissolved oxygen handheld. This video reviews the Model 55 with the Pro20 and Pro20i, with the Pro20 offering a user-replacable cable, unlike the Pro20i and Model 55.

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