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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
Mesures précises et stables
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
| Paramètres | Spécifications |
|---|---|
| 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 |
| Précision de la mesure | DO: ±0.3 mg/L or ±3 %Temperature: ±0.5 ℃ |
| Signal de sortie | RS485 |
| Matériau du boîtier | 316L Stainless Steel + PPS |
| Classe de protection | IP68 |
| Sensor Dimensions | Ø49.5 × 251.5 mm |
| Installation Method | Submersible |
| Température ambiante | 0 ~ 60 ℃ |
| Humidité relative | < 90 % RH |
| Cable Length | 10 m standardUp to 100 m customizable |
Instrava OEM/ODM
Custom Engineering & Service Support
Instrava goes beyond supplying sensors. We work as a long-term engineering partner, supporting customers from selection to deployment and long-term operation.
What We Can Customize
Application-oriented sensor selection
Sensor configuration optimized for wastewater, environmental water, aquaculture, or industrial processes.Installation & mounting design
Support for submersible, pipeline, tank, or custom installation structures.Signal & system integration
RS485 communication mapping for PLC, DCS, SCADA, and data acquisition systems.Cable length & material customization
Extended cables (up to 100 m) and material options for harsh environments.Multi-parameter system design
Integration with pH, ORP, conductivity, turbidity, and temperature sensors.OEM & private labeling services
Branding, enclosure customization, and documentation support.
Engineering Support Services
Pre-sales application analysis
Selection guidance for complex operating conditions
Commissioning support and parameter configuration
Long-term technical support and lifecycle consultation
Instrava focuses on trust, communication, and collaboration, helping customers reduce risk, improve reliability, and extend system service life.
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.
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.
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.
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.
Yes.
The sensor supports RS485 communication, typically using Modbus protocol, allowing seamless integration with PLC, DCS, SCADA, and data logging systems.
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.
Pourquoi choisir Instrava ?
En choisissant Instrava, vous bénéficiez d'un partenaire ayant une connaissance approfondie des applications industrielles et l'expertise nécessaire pour relever les défis opérationnels d'aujourd'hui.
Notre rôle va au-delà des produits - nous soutenons votre réussite grâce à des solutions fiables et à un engagement à long terme.
L'innovation par l'ingénierie
L'innovation chez Instrava est guidée par les exigences industrielles réelles. Nous affinons continuellement nos technologies pour répondre aux défis opérationnels en constante évolution, en garantissant des performances pratiques et fiables dans des environnements exigeants.
Personnalisation en fonction de l'application
Nous offrons une personnalisation au niveau de l'ingénierie pour répondre aux conditions spécifiques du processus. De la plage de mesure et des matériaux aux signaux de sortie et aux options d'installation, nos solutions sont configurées pour s'adapter aux applications réelles.
Une qualité et une fiabilité éprouvées
La qualité et la fiabilité sont fondamentales pour chaque produit Instrava. Fabriqués sous un contrôle de qualité strict et testés de manière approfondie, nos instruments offrent des performances précises, stables et à long terme.
Une capacité mondiale avec un soutien local
Instrava associe une expertise technique mondiale à un support local réactif, garantissant à nos partenaires une technologie alignée au niveau international et un service régional opportun.
Un portefeuille de produits complet
Notre large gamme d'instruments de mesure et de contrôle nous permet de répondre à un grand nombre de besoins industriels, en fournissant des solutions intégrées à partir d'une source unique et fiable.
Soutien technique axé sur les partenaires
Nous travaillons en étroite collaboration avec nos partenaires, de la consultation technique à l'assistance après-vente. Notre objectif est de fournir des solutions qui créent une valeur durable et soutiennent le succès opérationnel à long terme.
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