DS380 series of fluorescent dissolved oxygen sensors use a new generation of fluorescence lifetime technology and high-performance fluorescent materials. No oxygen consumption, No flow rate limitation, no electrolyte, no maintenance and calibration, no interference from hydrogen sulfide, and excellent stability. Built-in temperature sensor, automatic temperature compensation. An RS485 output can be networked without a controller.

Features of Dissolved Oxygen Sensor:

1. DO Sensor, RS485 output, supports MODBUS, which can realize networking and system integration without a controller.
2. There is no electrolyte, interference, or need for frequent calibration.
3. No oxygen consumption, no flow rate limit.
4. Built-in temperature sensor, automatic temperature compensation.
5. The water filter membrane, will not be attached to pollutants in the water.
6. Good stability, high measurement accuracy, and fast response.

Technical parameter:

Customer Cases in Aquaculture:

Applications of Optical Dissolved Oxygen Sensors:

A dissolved oxygen sensor is a sensing device used to measure the dissolved amount of oxygen in water. Dissolved oxygen sensors are widely used in aquaculture such as fish ponds, sewage treatment industry, hydrological monitoring, environmental monitoring, and in education and scientific research.

Application of Optical Dissolved Oxygen Sensors in Aquaculture

Dissolved oxygen is crucial for aquaculture as it directly affects the growth, health, and yield of fish and shrimp. Optical dissolved oxygen sensors enable real-time monitoring of oxygen levels in water, helping farmers optimize aeration strategies and prevent fish mortality due to oxygen depletion.

Application Scenarios:

-Real-time monitoring of dissolved oxygen levels to ensure an appropriate oxygen concentration (typically 4-8 mg/L).

-Automatic control of aeration equipment (such as aerators and aeration systems) to reduce energy consumption and improve farming efficiency.

-Predicting water quality changes to prevent diseases and mortality caused by low oxygen levels.

Advantages:

-No need for frequent calibration, reducing maintenance costs.

-Unaffected by water flow speed, suitable for both still and slow-moving water environments.

-Applicable to both saltwater and freshwater, meeting diverse aquaculture needs.

Application of Optical Dissolved Oxygen Sensors in Wastewater Treatment

During wastewater treatment, dissolved oxygen levels directly impact the efficiency of microbial degradation of organic matter. Optical dissolved oxygen sensors provide real-time monitoring of oxygen levels in aeration tanks and effluent outlets, optimizing aeration control and reducing energy consumption.

Application Scenarios:

-Dissolved oxygen monitoring in aeration tanks: Ensures that microorganisms effectively degrade organic matter, improving wastewater treatment efficiency.

-Energy-efficient aeration optimization: Prevents over-aeration, reducing energy costs (aeration is a major energy consumer in wastewater treatment plants).

-Effluent water quality monitoring: Ensures that discharged wastewater meets environmental protection standards.

Advantages:

-High resistance to pollution, suitable for wastewater with high turbidity and organic content.

-No need to replace electrolytes, reducing maintenance requirements.

-High stability, ideal for long-term continuous monitoring.

Application of Optical Dissolved Oxygen Sensors in Hydroponic Agriculture

Hydroponics is a soil-free cultivation technique where oxygen supply to plant roots is essential. Optical dissolved oxygen sensors help farmers optimize oxygen levels in nutrient solutions, promoting healthy plant growth.

Application Scenarios:

-Optimizing oxygen supply to enhance root respiration and improve nutrient absorption efficiency.

-Preventing root oxygen deficiency, reducing root rot and diseases, thereby increasing crop yield and quality.

-Automated hydroponic systems, integrating with IoT technology to enable smart irrigation and oxygen management.

Advantages:

-High accuracy and low drift, ideal for long-term hydroponic monitoring.

-Unaffected by the chemical composition of nutrient solutions, adaptable to various crops.

-Compatible with smart agriculture systems, allowing integration with automated control systems.

Application of Optical Dissolved Oxygen Sensors in Environmental Monitoring

Dissolved oxygen is a key indicator of water body health. Optical dissolved oxygen sensors are widely used in ecological monitoring, eutrophication assessment, and marine research.

Application Scenarios:

Monitoring of Rivers, Lakes, and Reservoirs:

-Tracking dissolved oxygen levels to assess ecological health.

-Predicting algal blooms and preventing eutrophication (e.g., cyanobacterial outbreaks).

-Evaluating the impact of industrial discharge on water quality.

Marine Monitoring:

-Studying oxygen distribution in seawater to understand ocean currents’ impact on ecosystems.

-Monitoring oceanic dead zones, and providing early warnings for marine ecological crises.

-Long-term monitoring using buoys, ROVs (Remotely Operated Vehicles), and AUVs (Autonomous Underwater Vehicles).

Drinking Water Source Monitoring:

-Ensuring water quality safety by detecting organic pollution levels.

-Combining with other sensors (e.g., pH, turbidity) for comprehensive water quality assessment.

Advantages:

-Suitable for long-term field monitoring (low power consumption, corrosion-resistant, and pollution-resistant).

-Data can be transmitted remotely, supporting IoT-based real-time monitoring.

-Unaffected by water flow speed, making it ideal for both still and flowing water environments.

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FAQs About Dissolved Oxygen (DO) Sensors:

Q1: Why is it important to measure dissolved oxygen in water?

Dissolved oxygen (DO) is critical for the survival of aquatic life, as fish and other organisms rely on oxygen in the water to breathe. Measuring DO helps assess water quality and ensures that oxygen levels are sufficient to support healthy ecosystems, wastewater treatment processes, and aquaculture operations.

Q2: What is the ideal dissolved oxygen level for fish?

The ideal dissolved oxygen level for fish generally ranges from 5 to 8 mg/L. However, this can vary depending on the species. Fish can survive in lower levels, but anything below 3 mg/L can stress fish and lead to suffocation, while levels above 10 mg/L are often unnecessary and could indicate excessive aeration.

Q3: What is a dissolved oxygen sensor?

A dissolved oxygen (DO) sensor is a device used to measure the concentration of oxygen dissolved in water. It is commonly used in environmental monitoring, aquaculture, wastewater treatment, and industrial processes to ensure oxygen levels are within required thresholds.

Q4: How Do Optical Dissolved Oxygen Probes Work?

Optical dissolved oxygen probes use a luminescent material that emits light when exposed to oxygen. When oxygen is present, it quenches the fluorescence of the material. By measuring the change in fluorescence, the sensor calculates the concentration of oxygen in the water. Optical probes are more durable and require less maintenance compared to electrochemical sensors.

Q5: How do you clean a dissolved oxygen sensor?

To clean a dissolved oxygen sensor:

Gently remove the sensor from the water.

For optical sensors, wipe the probe with a soft cloth to remove any fouling or debris.

Always refer to the manufacturer’s guidelines for specific cleaning instructions.

Q6: How Do You Calibrate a DO Sensor?

Calibrating a DO sensor typically involves:

Air calibration: Exposing the sensor to ambient air (which should be 100% saturated with oxygen) to set the 100% DO reading.

Zero calibration: For electrochemical sensors, this involves using a sodium sulfite solution or another oxygen-depleting method to create a zero DO environment for accurate calibration.

Q7: What is the Difference Between Optical and Electrochemical DO Sensors?

Optical Sensors: Use luminescence to measure DO levels without consuming oxygen. They are low-maintenance, have no electrolyte solution, and provide long-term stability.

Electrochemical Sensors: Use electrodes and electrolyte solutions to measure oxygen levels. These sensors require regular calibration, membrane replacement, and electrolyte refills but are often more cost-effective.

Q8: What Are Common Applications of DO Sensors?

DO sensors are used in:

Aquaculture: To monitor oxygen levels for healthy fish and other aquatic organisms.

Wastewater treatment: Ensuring proper oxygen levels for biological processes.

Environmental monitoring: Measuring oxygen levels in rivers, lakes, and oceans to assess water quality.

Industrial processes: In fermentation, brewing, and other production processes, oxygen levels must be controlled.

Q9: How Long Does an Optical DO Sensor Last?

Optical DO sensors can last several years, with typical lifespans ranging from 3 to 5 years depending on usage and maintenance. They are more durable than electrochemical sensors and require less frequent servicing.

Q10: How Often Should an Optical DO Sensor Be Maintained?

Optical sensors require minimal maintenance, usually needing cleaning and occasional recalibration every few months or as recommended by the manufacturer.

Related Products:

Portable Handheld Dissolved Oxygen Meter

Automatic Aeration Control System for Aquaculture

Related Articles:

Which water quality sensors are commonly used in aquaculture?

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