Dissolved Oxygen Analyzer



Dissolved Oxygen Analyzer


SMART series intelligent multi-parameter universal controller has high accuracy, its unique professional design can be applied in water, chemical, pharmaceutical, food and hygiene in the production process of the most extreme physical and chemical environments. SMART series intelligent multi-parameter universal controller has modular bus structure, highly scalable functionality, high reliability and comfortable operation.


Dissolved oxygen is the content of gaseous molecular oxygen dissolved in water. The content of dissolved oxygen in water is closely related to the partial pressure of oxygen in the air and the temperature of water.

Luminescent optical method: the blue pulsating light beam emitted by the internal optical system of the sensor hits the fluorescent layer, and the marker "responds" (produces fluorescence) with pulsating red light. The duration and intensity of the excited response signal are directly related to oxygen The composition is related to the partial pressure.  (*Amperometric method: Oxygen molecules penetrate the gas permeable membrane at the front of the sensor and are reduced by the working electrode to generate a diffusion current proportional to the oxygen concentration.)


Sewage treatment plant

▲Drinking water plant

Rivers and lakes


Circulating water of power plant boiler

Fermentation tank product quality monitoring in the food and pharmaceutical industry


Smart digital MEMS sensor

Sensor self-diagnosis, proactively reminding maintenance and management

★Automatically completes all compensation and measurement algorithms

Real-time temperature, salinity and pressure compensation

Quick response sensor

★IP68 Sensor

★Luminescent optical sensor

Good robustness

No calibration, no film, no fluoride, no drift

Unlimited PH value, CO2, H2S, SO2 influence

High-precision measurement under low dissolved oxygen concentration

No oxygen consumption

Comply with ASTM standard D888-05


No need to wait for polarization, measure immediately!

No need to replace the membrane and fluorocarbon, saving cost!

No need to disassemble, convenient!

No regeneration, it is impossible to predict the decay from sewage on the surface of the thermometer

H2S or ammonia in the liquid does not affect the measurement

No need to replace the film and carbon dioxide

No need to continuously perform on-site calibration

Clean the sensor surface: every month

Sensor calibration: every quarter

Replace the fluorescent cap: about every 2 years

Application Case

Sewage aeration tank: Nitrogen and phosphorus removal, COD degradation, and dissolved oxygen as an important parameter for controlling aeration.

Ion: Dissolved oxygen detection during iron and manganese ion removal process

Power plant: boiler water supply

Controller features

• Quick and convenient

    The navigation menu contains 6 languages, which can be operated easily.

• Process safety

    4.3" or 7" large size color LCD touch screen, convenient and safe touch operation and debugging

    Large size screen with red flashing alarm, clearly visible from long distances and in dark areas

    Alarm immediately, safe the process    

• Alarm event record

    Real-time data curve display

    Record function for up to 6000 alarms

• Expert calibration function

   Multi-point calibration function up to 9 point

• Powerful self-diagnosis function

    Built-in heartbeat monitoring function and watchdog

    Monitor the status of controllers and sensors, and promptly remind customers to take necessary maintenance

    High-standard hardware and software security and password protection

• Powerful control function

    High(low) limit control function

    Optional: Timer control(automatic cleaning) function

    Optional: analog PID controller

    Optional: PWM controller

• Flexible fieldbus communication functions for IOT4.0

    Optional fieldbus MODBUS, HART, Foundation Fieldbus FF, PROFIBUS PA, PROFIBUS DP, etc.


Product datasheet: Dissolved Oxygen Analyzer , if you need more information, please contact us at info@mzdd.de.

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