Desun Uniwill Sharing Several Types of Dissolved Oxygen Sensors

Dissolved oxygen (DO) sensors are widely used in various industries, including wastewater treatment, aquaculture, and environmental monitoring. There are several types of dissolved oxygen sensors, including:

1, Clark-type sensors:

These sensors are based on the electrochemical reaction between oxygen and a cathode. The sensor consists of a cathode, an anode, and an electrolyte solution. When oxygen is present, it reacts with the cathode, generating a current that is proportional to the concentration of dissolved oxygen.

2, Optical Dissolved Oxygen sensors:

These sensors use a fluorescence-based technology to measure dissolved oxygen. The sensor contains a light source that excites a fluorescent material in the presence of oxygen. The intensity of the emitted light is proportional to the concentration of dissolved oxygen.

Types of Dissolved Oxygen Sensors

3, Polarographic sensors:

These sensors use a polarographic electrode to measure dissolved oxygen. The electrode consists of a platinum cathode and a silver anode, separated by a membrane. When oxygen diffuses through the membrane, it is reduced at the cathode, generating a current that is proportional to the concentration of dissolved oxygen.

4, Galvanic sensors:

These sensors use a galvanic cell to measure dissolved oxygen. The cell consists of a cathode made of lead and an anode made of zinc. When oxygen is present, it reacts with the cathode, generating a current that is proportional to the concentration of dissolved oxygen.

5, Amperometric sensors:

These sensors use an amperometric electrode to measure dissolved oxygen. The electrode consists of a working electrode and a reference electrode. When oxygen diffuses through a membrane and reaches the working electrode, it is reduced, generating a current that is proportional to the concentration of dissolved oxygen.

6, Luminescence-based sensors:

These sensors use the principle of luminescence quenching to measure dissolved oxygen. The sensor contains a fluorescent material that emits light when excited. The presence of oxygen quenches the fluorescence, and the intensity of the emitted light is proportional to the concentration of dissolved oxygen.

7, Microelectromechanical systems (MEMS)-based sensors:

These sensors are based on microfabrication techniques and use microscale electrodes and membranes to measure dissolved oxygen. MEMS-based sensors offer high sensitivity, low power consumption, and compact size, making them suitable for portable and remote sensing applications.

8, Conductivity-based sensors:

These sensors measure the electrical conductivity of the solution, which is affected by the concentration of dissolved oxygen. The sensor consists of two electrodes that measure the resistance of the solution between them. The resistance is inversely proportional to the concentration of dissolved oxygen.

9, Acoustic-based sensors:

These sensors use sound waves to measure the concentration of dissolved oxygen. The sensor emits high-frequency sound waves that are reflected back by the bubbles of oxygen. The time delay between the emission and reception of the sound waves is used to calculate the concentration of dissolved oxygen.

Each type of dissolved oxygen sensor has its advantages and limitations, and the choice of sensor depends on the specific application and the required level of accuracy and reliability. It is important to consider factors such as cost, maintenance requirements, and compatibility with the sample matrix when selecting a dissolved oxygen sensor.

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Related Product: https://disen-sensor.com/product/do-sensor/

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