1.3/1/2LCD with blue-light 2.Automatic temp compensation 3.Immediate response 4.Easy to carry 5.composed of polarographic Characteristics 1.3/1/2LCD with blue-light 2. Automatic temperature compensation 3.Immediate response 4.Easy to carry 5.D.C. power supply: one piece of 9V battery 6.The electrode system is composed of polarographic oxygen electrode and temperature electrodeSpecifications1. Measurement range:Dissolved oxygen: 0-20 mg/LTemperature: 0-40°C2. Accuracy:Dissolved oxygen: ±0.3 mg/L±1bit (under the basic temperature)                           ±0.5 mg/L±1bit(differ: ±10°C from the basic temperature)                            Temperature:±1°C±1bit3. Response time:≤30s (90% response at 20.0°C).4. .Stability of the meter:not over ±0.2mg/L ±1bit within one hour5.. Remaining current:≤0.15mg/L6. The range of automatic temp erature compensation:0-40°C