DO2 Instruments
DO2 Indicator:
A DO2 indicator, also known as a Dissolved Oxygen Indicator or Oxygen Saturation Indicator, measures the dissolved oxygen levels in a solution, typically in water or wastewater treatment processes.
What does it measure?
DO2 indicators measure:
1. Dissolved Oxygen (DO) levels: The amount of oxygen dissolved in water.
2. Oxygen Saturation: The percentage of dissolved oxygen relative to the maximum possible concentration.
Types of DO2 Indicators:
1. Electrochemical sensors
2. Optical sensors (e.g., luminescent or fluorescence-based)
3. Membrane-covered probes
Applications:
1. Water treatment plants
2. Wastewater treatment plants
3. Aquaculture and fish farming
4. Industrial processes (e.g., chemical, food, and beverage)
5. Environmental monitoring
Importance:
Accurate DO2 measurement ensures:
1. Efficient treatment processes
2. Optimal water quality
3. Compliance with regulatory standards
4. Prevention of corrosion and scaling
5. Healthy aquatic ecosystems
Common DO2 Indicator Parameters:
1. Measurement range: 0-20 mg/L (milligrams per liter)
2. Accuracy: ±0.1-0.5 mg/L
3. Resolution: 0.01-0.1 mg/L
4. Response time: seconds to minutes
Examples of DO2 Indicators:
1. Hach DO200
2. YSI ProDSS
3. Thermo Scientific Orion DO6
4. Mettler Toledo OptiO2
Factors Affecting DO2 Readings:
1. Temperature
2. Pressure
3. Salinity
4. Turbidity
5. Interfering substances (e.g., sulfides, chlorides)
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