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SPECIFICATIONS <br /> Operating Environment <br /> Medium fresh, sea, or polluted water <br /> Temperature: -5 to +45°C <br /> Depth 0 to 12 or 0 to 25 feet (depending on cable length) <br /> Storage Temperature: -10 to +50°C <br /> Material: ABS, Stainless Steel, Acrylic, and other materials <br /> Dimensions: <br /> Height 9.5 inches (24.13 cm) <br /> Thickness 2 2 inches (49.53 cm) <br /> Width: 3 5 inches max ( 8 89 cm) <br /> Weight 1 7 pounds ( 3 74 kg) <br /> Power: 9 VDC - 6 AA-size Alkaline Batteries (included) <br /> Approximately 100 hours operation from each new set of batteries <br /> Water Tightness: Meets or exceeds IP65 standards <br /> Extensive testing of the YSI Model 55 suggests the following typical performance: <br /> Temperature <br /> Sensor Type . Thermistor <br /> Range.... .. -5 to +45°C <br /> Accuracy. .... . .± 0 4°C <br /> Resolution 01°C <br /> Dissolved Oxygen % Saturation <br />' Sensor Type. Membrane covered polarographic <br /> Range . .. 0 to 200 % air saturation <br />{ Accuracy . ... . ...+ 2 % air saturation <br /> Resolution..... . 0 1 % air saturation <br /> Dissolved Oxygen mg/i <br /> Sensor Type .. ... Calculated from % air saturation, temperature and salinity <br /> Range. . . ... .. . 0 to 20 mg/1 <br /> Accuracy..... ± 0 3 mg/l <br />' Resolution... .. 0 01 mg/1 <br /> 3 <br /> 9 <br /> a <br />