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YSI® 55 Dissolved Oxygen Meter











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:


Specifications:

Probe Operating Environment

Medium: fresh, sea, or polluted water

Temperature: -5 to +45oC

Depth: 0 to 12, 0 to 25 or 0 to 50 feet (depending on cable length)

Meter Ambient Operating/Storage Temperature: -10 to +50oC

Material: ABS, Stainless Steel, Acrylic, and other materials.

Dimensions:

Height: 9.5 inches (24.13 cm)

Thickness: 2.2 inches (5.6 cm)

Width: 3.5 inches max. ( 8.89 cm)

Weight: 1.7 pounds ( 0.77 kg)

Power: 9 VDC - 6 AA-size Alkaline Batteries (included)

Approximately 100 hours operation from each new set of batteries

Water Tightness: Meets or exceeds IP65 standards


Extensive testing of the YSI Model 55 suggests the following typical performance:


Temperature

Sensor Type................Thermistor

Range..........................-5 to +45oC

Accuracy...........….......± 0.2oC

Resolution...........….....0.1oC


Dissolved Oxygen % Saturation

Sensor Type................Membrane covered polarographic

Range..........................0 to 200 % air saturation

Accuracy...........….......± 2 % air saturation

Resolution...........….....0.1 % air saturation


Dissolved Oxygen mg/L

Sensor Type................Calculated from % air saturation, temperature and salinity.

Range..........................0 to 20 mg/L

Accuracy...........….......± 0.3 mg/L

           Resolution........….…....0.01 mg/L


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