How Ethernet-APL Enables Industrial IoT and Smart Instrumentation
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Dissolved Oxygen Sensor
Designed for continuous dissolved oxygen monitoring in water and wastewater processes, this optical dissolved oxygen sensor eliminates the limitations of traditional membrane-based probes. With no electrolyte, no oxygen consumption, and no flow dependency, it delivers stable, accurate measurements even in low-flow or static conditions.
It is especially suitable for applications where long-term stability, low maintenance, and reliable digital communication are critical.
Transmitters & Sensors Description
Why Optical Dissolved Oxygen Measurement
Traditional electrochemical DO sensors require membranes, electrolytes, and frequent maintenance. This optical dissolved oxygen sensor adopts fluorescence measurement technology, providing a fundamentally different approach:
No membrane, no electrolyte, no polarization
No oxygen consumption during measurement
Stable readings independent of flow velocity
Longer service life with significantly reduced maintenance cost
This makes it ideal for unattended operation and harsh field environments.
Dissolved O2 Sensor Features
Maintenance-Free Optical Technology
Membrane-free design with no electrolyte replacement
No polarization effect, no drift caused by oxygen consumption
Fluorescent cap is easy to replace when required
Accurate & Stable Measurement
Fast response time and excellent long-term stability
Minimal annual drift ensures consistent performance
Built-in temperature sensor with automatic temperature compensation
Designed for Field Reliability
Fully sealed IP68 housing for submersible installation
316L stainless steel + PPS body resists corrosion
Not affected by flow rate, bubbles, or low-velocity conditions
Digital Integration Ready
RS485 communication (Modbus-compatible)
Easy connection to PLC, SCADA, or upper-level control systems
Dissolved Oxygen Sensors Applications
Wastewater treatment (aeration basins, biological tanks)
Surface water and environmental monitoring
Aquaculture and fish farming systems
Industrial process water
Municipal water and utility monitoring
Dissolved Oxygen Sensor Designed for Long-Term Operation
By removing consumable components and minimizing maintenance requirements, this dissolved oxygen sensor significantly reduces total cost of ownership while ensuring reliable data for process control and environmental compliance.
It is not just a sensor—it is a long-term monitoring solution.
Transmitters & Sensors Parameter
| Parameter | Specification |
|---|---|
| Measurement Principle | Optical fluorescence |
| Dissolved Oxygen Range | 0 ~ 20 mg/L or 0 ~ 200 % saturation |
| Temperature Range (Process) | 0 ~ 45 ℃ |
| Operating Pressure | ≤ 0.3 MPa |
| Measurement Accuracy | DO: ±0.3 mg/L or ±3 %Temperature: ±0.5 ℃ |
| Output Signal | RS485 |
| Housing Material | 316L Stainless Steel + PPS |
| Protection Class | IP68 |
| Sensor Dimensions | Ø49.5 × 251.5 mm |
| Installation Method | Submersible |
| Ambient Temperature | 0 ~ 60 ℃ |
| Relative Humidity | < 90 % RH |
| Cable Length | 10 m standardUp to 100 m customizable |
Instrava OEM/ODM
Reliable Instruments. Solutions That Fit Your Application.
Instrava is focused on delivering reliable industrial solutions through carefully curated products, application-driven optimization, and flexible customization. We select proven instruments from trusted manufacturers to ensure consistent quality, optimize solutions based on real working conditions to solve practical challenges, and provide tailored configurations to meet specific application needs.
By combining selection expertise with application understanding, Instrava helps customers reduce risk, improve efficiency, and achieve dependable results in complex industrial environments.
Can the sensor measure accurately at very low flow or in static water?
Yes.
This sensor uses optical fluorescence technology and does not consume oxygen during measurement. The reading is independent of flow velocity, making it highly reliable in low-flow or stagnant conditions.
Will air bubbles affect the dissolved oxygen measurement?
The optical measurement principle is far less sensitive to bubbles than electrochemical sensors. Occasional bubbles do not significantly affect readings, especially in aeration tanks or mixed water environments.
How stable is the sensor for long-term monitoring?
The sensor features minimal annual drift and no electrolyte consumption. Compared to membrane-based DO probes, it maintains accuracy over long periods with significantly reduced recalibration frequency.
How often does the sensor require maintenance?
Routine maintenance is minimal.
There is no membrane or electrolyte to replace. The fluorescent cap has a long service life and can be easily replaced when required, reducing downtime and maintenance cost.
Is RS485 communication compatible with PLC or SCADA systems?
Yes.
The sensor supports RS485 communication, typically using Modbus protocol, allowing seamless integration with PLC, DCS, SCADA, and data logging systems.
Can this sensor be used in harsh wastewater environments?
Absolutely.
With an IP68-rated housing and 316L stainless steel + PPS construction, the sensor is designed for continuous submersible operation in corrosive, high-humidity, and industrial wastewater conditions.
Why Choose Instrava
Built on Consistency, Not Claims
Focused on Industrial Applications
We specialize in industrial analysis and detection, with a clear understanding of real-world operating environments and requirements.
Strict Product Selection Criteria
Every instrument is evaluated based on performance, stability, and application suitability—not just specifications or pricing.
Reliable Supply & Quality Consistency
We work with trusted manufacturers to ensure stable supply, consistent quality, and dependable delivery.
Practical, Experience-Based Support
Our recommendations are grounded in application understanding, helping customers avoid common issues and achieve reliable results.
Instrava is built to reduce uncertainty—so every decision you make is clearer, safer, and more reliable.
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