Views: 0 Author: Site Editor Publish Time: 2025-07-18 Origin: Site
A Dissolved Oxygen Sensor (DO Sensor) is essential core equipment for aquaculture, wastewater treatment, and environmental monitoring. It provides real-time, accurate measurement of dissolved oxygen levels in water, enabling prevention of mass fish kills, optimization of aeration energy consumption, and safeguarding water quality safety. Especially against the backdrop of frequent high-temperature climates in 2025, sudden hypoxia events cause significant economic losses for farmers. Fluorescent method DO sensors have become the industry's first choice due to advantages like minimal maintenance and anti-interference capabilities. This article combines the latest technological trends to analyze TOP 5 products and key scientific purchasing considerations.
Sudden Hypoxia Events: Rapid water temperature increases or algal blooms can cause dissolved oxygen levels to plummet dramatically. Without real-time monitoring, mass fish mortality can occur within 30 minutes.
Lack of Data Accuracy: Traditional electrode methods require frequent calibration and are susceptible to sulfide interference. The fluorescent method utilizes optical phase detection technology, eliminating consumables and offering error ≤±2%F.S.
Cost Control: Aeration energy accounts for over 60% of operating costs in wastewater treatment plants. Precise DO monitoring can reduce this energy consumption by 15% or more.
Scenario | Using DO Sensor | Not Using DO Sensor |
|---|---|---|
Aquaculture Survival Rate | ≥95% (Real-time aeration control) | ≤70% (Sudden hypoxia mortality) |
Wastewater Energy Use | Reduced by 10%-15% | Excessive or insufficient aeration |
Maintenance Frequency | 1x/year or no need (Fluorescent Method) | Monthly electrolyte replacement (Electrode Method) |
Core Features: 0~20mg/L Range, ±0.3mg/L Accuracy, IP68 Waterproof, RS485 Output.
Price Range: About＄520-＄640 (Cost-Effective).
Unique Selling Point (USP): Designed specifically for farmers; integrates with aerators for automatic start/stop; Cable extendable up to 100m.
Ideal For: Fish ponds, shrimp ponds, and other open water bodies.
Core Features: ±0.1ppm Resolution, 2-Year Maintenance-Free, Self-Cleaning Anti-Fouling Coating.
Price Range: About＄880-＄1000
Unique Selling Point (USP): Anti-biofouling technology, ideal for seawater monitoring.
Core Features: Anti-microbial Membrane, reduces biofilm growth by 90%, Drift <±0.2mg/L (over 3 months).
Price Range: About＄1220-＄1500
Unique Selling Point (USP): Military-grade protection, withstands corrosive and strong acid environments.
Core Features: ±0.05mg/L Ultra-High Accuracy, 5-Second Fast Response.
Price Range:About＄780-＄900
Unique Selling Point (USP): Multi-layer electromagnetic shielding, ideal for complex secondary water supply environments.
Core Features: Patented Fluorescent Cap Technology, Immune to H₂S and CO₂ Interference.
Price Range: About＄1000-＄1200.
Unique Selling Point (USP): "Aquaculture," "Ocean," "General" modes with one-button switching.
Product Comparison Image ALT Text: Top 5 Fluorescent Dissolved Oxygen Sensor Brands Comparison - Accuracy, Price, Anti-Fouling Performance
Measurement Accuracy: ±0.1mg/L is high precision (e.g., Gandan GD52), ±0.3mg/L meets aquaculture needs (e.g., Pubase PFDO-500).
IP Protection Rating: IP68 (Long-term submersion) > IP65 (Splash-proof).
Temperature Compensation: Automatic compensation via Pt1000 RTD chip prevents errors from water temperature fluctuations.
Also, our DO sensors sells well in the market, fluorescence method with a resolution ratio 0.01mg/L, 0.1℃. Price: ＄210, EXW price.
Scenario | Recommended Product | Key Buying Considerations |
|---|---|---|
Aquaculture | Pubase PFDO-500 | Low Cost, Cable Extendability |
Seawater/Wastewater Plant | Lomeson Sensor | Anti-microbial Coating, Corrosion Resistance |
Lab/Ultra Pure Water | Shuopu SPLDO | Maintenance-Free, High Resolution |
Q: Does a DO sensor require regular calibration?
Fluorescent method sensors generally require no calibration (e.g., Shuopu SPLDO). Electrode methods need monthly calibration. Annual baseline verification is recommended for all types.
Installation Location:
Keep away from outlets/stagnant zones. Ensure adequate water flow and mixing (velocity > 0.3m/s).
Avoid direct sunlight to prevent algae growth on the probe.
Mounting Bracket Choice:
Use ONLY the OEM Mounting Kit! Homemade brackets often cause improper sealing, allowing contamination ingress and sensor damage.
Opt for designs like Stainless Steel chain + guide tubes, utilizing water flow vibration for automatic surface cleaning.
Maintenance Schedule:
Fluorescent Method: Clean the optical window quarterly (wipe gently with alcohol-dampened soft cloth).
Electrode Method: Clean the membrane cap weekly; replace electrolyte promptly.
