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Liquid Analysis
Dissolved Oxygen Meter for Water
n biological treatment processes, aquaculture management, environmental compliance, and laboratory water analysis, dissolved oxygen (DO) directly determines process stability, energy efficiency, and ecological safety.
The Instrava Dissolved Oxygen Meter for Water is engineered to provide high-precision, field-ready DO measurement with dual-technology options — membrane method and optical fluorescence method — allowing engineering teams to select the optimal balance between initial investment and long-term maintenance strategy.
With large digital display, high-accuracy probe design, triple compensation (temperature, salinity, altitude), and 99-point data storage, this instrument ensures stable performance across freshwater, seawater, and variable-altitude environments.
Designed for operational reliability and field efficiency, it delivers dependable measurement performance under real industrial conditions.
Liquid Analysis Description
Dissolved Oxygen Meter Typical Application Scenarios
Municipal wastewater treatment plant aeration control
Industrial biological process monitoring
Aquaculture pond oxygen management
Environmental surface water inspection
Laboratory water quality testing
Field sampling in remote or high-altitude areas
This device supports both routine operational control and mobile compliance verification tasks.
Dissolved Oxygen Meter Engineering Advantages
Dual Measurement Technologies for Flexible Deployment
Membrane Method Model
Measuring range up to 0.0–30.0 mg/L
Proven electrochemical measurement principle
Suitable for routine industrial and environmental testing
Complete accessory kit included for maintenance
Optical Fluorescence Method Model
Reduced routine maintenance
No electrolyte handling
Stable long-term performance
Ideal for users prioritizing low operational intervention
Procurement teams can select based on lifecycle cost considerations and site maintenance capabilities.
Triple Compensation for Measurement Integrity
Dissolved oxygen concentration is highly influenced by environmental conditions. Instrava integrates:
Automatic Temperature Compensation (ATC)
Salinity Compensation (0–42 ppt)
Altitude Compensation (up to 3500 m for membrane model)
This ensures consistent accuracy in:
Seawater applications
Plateau regions
Variable seasonal conditions
Measurement accuracy remains stable at ±3.0% FS across operating ranges.
Large Display & Field-Ready Ergonomics
Large LCD screen (38 × 54 mm) with backlight
Clear numeric visualization for low-light environments
Compact handheld body (70 × 30 × 169 mm)
Approx. 3.5 m probe cable for flexible measurement positioning
Powered by 4 × AAA batteries for portable operation
Auto shut-off function improves energy efficiency during field deployment.
Reliable Data Recording & Compliance Support
Manual storage of up to 99 data records
100% air saturation calibration
Temperature unit switching (°C / °F)
Suitable for:
Field documentation
Operational logs
Regulatory inspection support
Liquid Analysis Parameter
Dissolved Oxygen Meter Technical Specifications
Membrane Method Model
Dissolved Oxygen
Range: 0.0–30.0 mg/L
Resolution: 0.1 mg/L
Accuracy: ±3.0% FS
Calibration: 100% air saturation
Temperature
Range: -5.0–60.0°C
Resolution: 0.1°C
Accuracy: ±0.5°C
Unit: °C / °F switchable
Automatic Temperature Compensation: Supported
Compensation & Storage
Salinity Compensation: 0–42 ppt
Altitude Compensation: 0–3500 m
Data Storage: 99 manual records
Operational Parameters
LCD Size: 38 × 54 mm (Backlit)
Probe Cable Length: Approx. 3.5 m
Power Supply: 4 × AAA batteries
Auto Shut-off: 1 hour inactivity
Dimensions: 70 × 30 × 169 mm
Standard Configuration
Instrument / Probe / Membrane caps / Electrolyte / Syringe / Screwdriver / Gauze / Batteries / Manual / Certificate / Carrying case
Optical Fluorescence Method Model
Dissolved Oxygen
Range: 0.0–15.0 mg/L
Saturation Range: 0.0–119.9%
Resolution: 0.1 mg/L
Accuracy: ±3.0% FS
Calibration: 100% air saturation
Temperature
Range: 0.0–50.0°C
Resolution: 0.1°C
Accuracy: ±0.5°C
Unit: °C / °F switchable
Automatic Temperature Compensation: Supported
Compensation & Storage
Salinity Compensation: 0–42 ppt
Altitude Compensation: 0–1000 m
Data Storage: 99 manual records
Operational Parameters
LCD Size: 38 × 54 mm (Backlit)
Probe Cable Length: Approx. 3.5 m
Power Supply: 4 × AAA batteries
Auto Shut-off: 30 minutes inactivity
Dimensions: 70 × 30 × 169 mm
Standard Configuration
Instrument / Optical probe / AAA batteries / Manual / Certificate / Carrying case
Instrava Engineering Commitment
Instrava designs portable analytical instruments with a focus on:
Measurement stability under real operating conditions
Practical compensation algorithms
Field durability
Reduced operational complexity
This dissolved oxygen meter series is optimized for engineers who require reliable field performance, predictable maintenance cycles, and measurable operational control.
Instrava OEM/ODM
Instrava Engineering & Customization Support
At Instrava, our instruments are developed with a strong focus on real industrial applications. Each product is designed to operate as a reliable component within measurement, control, and automation systems, rather than as a standalone device.
Our engineering team supports customers during product selection by evaluating process conditions, operating environments, and system requirements, ensuring stable and long-term performance in actual use.
In addition to standard configurations, Instrava offers flexible customization options, including measurement range, materials, output signals, communication interfaces, and installation methods. All custom solutions are engineered to meet industrial standards and application-specific demands.
We also support OEM projects and system integration, providing consistent product design, technical documentation, and long-term supply to ensure smooth integration and reliable operation throughout the project lifecycle.
From a procurement and lifecycle perspective:
Membrane model is cost-effective upfront and suitable for facilities with structured maintenance routines.
Fluorescence model reduces maintenance workload, eliminates electrolyte handling, and minimizes routine servicing.
If your operation prioritizes lower initial investment, the membrane model is appropriate.
If you prioritize long-term stability, reduced downtime, and lower maintenance intervention, the fluorescence model delivers better total cost efficiency.
Dissolved oxygen is influenced by temperature, salinity, and altitude. Instrava integrates:
Automatic Temperature Compensation (ATC)
Salinity compensation (0–42 ppt)
Altitude compensation (up to 3500 m depending on model)
With ±3.0% FS accuracy and 0.1 mg/L resolution, the meter maintains consistent readings across freshwater, seawater, plateau regions, and seasonal variations.
The membrane method requires:
Periodic membrane cap replacement
Electrolyte replenishment
Calibration after maintenance
All required accessories are included in the standard configuration.
For plants with maintenance teams already managing electrochemical sensors, integration is straightforward and predictable.
Yes. The fluorescence model:
Does not require electrolyte
Does not require membrane replacement
Reduces routine maintenance frequency
Minimizes operator handling errors
For procurement managers evaluating long-term operating costs, this model typically reduces consumable expenses and labor time over the equipment lifecycle.
Yes. With measurement ranges up to 0.0–30.0 mg/L and support for % saturation readings, it is suitable for:
Aeration control in wastewater plants
Aquaculture oxygen management
Surface water environmental inspections
Laboratory validation testing
Its measurement stability supports operational optimization and compliance verification.
The meter supports manual storage of up to 99 data records, enabling:
Field inspection reporting
Operational logging
Compliance sampling documentation
For applications requiring portable measurement without complex data systems, this functionality provides practical and efficient data retention.
Why Choose Instrava
By choosing Instrava, you gain a partner with a deep understanding of industrial applications and the expertise to meet today’s operational challenges.
Our role extends beyond products—we support your success through dependable solutions and long-term commitment.
Engineering-Driven Innovation
Innovation at Instrava is guided by real industrial requirements. We continuously refine our technologies to address evolving operational challenges, ensuring practical and reliable performance in demanding environments.
Application-Specific Customization
We provide engineering-level customization to match specific process conditions. From measurement range and materials to output signals and installation options, our solutions are configured to fit real applications.
Proven Quality and Reliability
Quality and reliability are fundamental to every Instrava product. Manufactured under strict quality control and thoroughly tested, our instruments deliver accurate, stable, and long-term performance.
Global Capability with Local Support
Instrava combines global engineering expertise with responsive local support, ensuring our partners benefit from internationally aligned technology and timely regional service.
Comprehensive Product Portfolio
Our broad portfolio of measurement and control instruments enables us to address a wide range of industrial needs, providing integrated solutions from a single, reliable source.
Partner-Oriented Engineering Support
We work closely with our partners from technical consultation to after-sales support. Our focus is on delivering solutions that create lasting value and support long-term operational success.
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