Micro-dissolved oxygen (DO) meters measure trace oxygen levels (often in parts per billion, ppb) in water, critical for applications like aquaculture, wastewater treatment, and environmental research. Low DO levels can stress aquatic ecosystems, reducing biodiversity, while high levels may indicate over-aeration. According to the U.S. Environmental Protection Agency (EPA), DO levels below 4 mg/L can harm fish, while levels above 15 mg/L may disrupt industrial processes.
Precision: Detects trace oxygen levels (0-5% or ppb) for sensitive applications.
Portability: Compact designs suit fieldwork and lab use.
Real-Time Data: Enables immediate decision-making in dynamic environments.
Choosing the right micro-DO meter involves evaluating sensor type, calibration needs, and durability. Here’s what to consider:
Sensor Technology: Optical sensors offer low maintenance and stability, while electrochemical sensors provide fast response times.
Calibration: Regular calibration with zero-oxygen standards ensures accuracy, as per EPA guidelines.
Durability: Look for meters with robust probes resistant to biofouling and harsh conditions.
Temperature Compensation: Built-in features adjust for temperature’s impact on oxygen solubility.
The ERUN-SP3-A5 Trace Dissolved Oxygen Meter excels in these areas, offering optical sensor technology and automated calibration for reliable results.
The ERUN-SP3-A5 Trace Dissolved Oxygen Meter is a standout choice for professionals needing high-precision measurements. Designed by ERUN, a leader in water quality analyzers, this meter is ideal for trace oxygen detection in aquaculture, environmental monitoring, and industrial applications.
Measurement Range: 0-200 ppb, perfect for low-oxygen environments.
Optical Sensor: Low drift, minimal maintenance, and rapid response (3 seconds).
Temperature Compensation: Automatic adjustment for accurate readings across varying conditions.
Durability: IP67-rated, resistant to water and dust, suitable for fieldwork.
Price: Check erunwas.com for details.
Its advanced optical sensor eliminates the need for frequent recalibration, unlike electrochemical models, and its compact design suits both lab and field use. The meter complies with EPA standards for water quality monitoring, ensuring reliable data.
Micro-DO meters typically use optical or electrochemical sensors. Optical sensors, like those in the ERUN-SP3-A5, rely on fluorescence quenching, where oxygen molecules reduce the light emitted by a fluorophore. Electrochemical sensors generate a current proportional to oxygen concentration via a cathode-anode reaction.
Zero Calibration: Use zero-oxygen tablets dissolved in water for low-level accuracy.
Span Calibration: Employ solutions with known oxygen concentrations (e.g., 4M KCl).
Frequency: Calibrate before first use, after prolonged inactivity, or when readings deviate.
In a 2024 study, researchers used the ERUN-SP3-A5 to monitor DO levels in a coastal marine ecosystem. By deploying the meter at varying depths, they identified hypoxic zones caused by nutrient runoff, correlating low DO (below 2 mg/L) with algal blooms. This data informed local regulations to reduce pollution, showcasing the meter’s precision in environmental research.
A fishery in Southeast Asia adopted the ERUN-SP3-A5 to optimize oxygen levels for shrimp farming. Real-time DO monitoring revealed seasonal hypoxic conditions, enabling timely aeration adjustments. This increased shrimp survival rates by 20%, demonstrating the meter’s impact on economic sustainability.
| Meter | Sensor Type | Range | Calibration | Price | Best For |
|---|---|---|---|---|---|
| ERUN-SP3-A5 | Optical | 0-200 ppb | Automated | Contact | Aquaculture, Environmental |
| TecPen Portable | Optical | 0-5% | Manual | ~$500 | Industrial, Research |
| Hach Orbisphere 3100 | Electrochemical | 0.8 ppb-20 mg/L | Manual | ~$1000 | Wastewater, Beverage |
Note: Prices vary; check manufacturer websites for current rates.
Proper maintenance extends the lifespan and accuracy of micro-DO meters. Follow these EPA-recommended practices:
Clean Regularly: Rinse probes with deionized water to remove biofouling.
Store Properly: Keep in a dry, stable environment (0-40°C) to prevent sensor damage.
Inspect Probes: Check for membrane wear or contamination before use.
For professionals in water quality management, micro-DO meters are indispensable. The ERUN-SP3-A5, with its precision and low maintenance, offers excellent value for environmental scientists, aquaculturists, and industrial technicians. Its compliance with national standards and real-world reliability make it a top choice for driving accurate, data-driven decisions.
Visit erunwas.com to explore the ERUN-SP3-A5 and elevate your water quality monitoring.
