E+H oxygen sensor

Unveiling the Working Principle of E+H Oxygen Sensor

In various applications such as aeration control, fermentation, and inerting, the measurement of dissolved oxygen is crucial for assurance and process control. Among the reliable instruments available for this purpose, the E+H oxygen sensor stands out for its high precision and reliability. This article aims to elucidate the working principle of the E+H oxygen sensor, highlighting its key components and operational processes.

The E+H oxygen sensor is widely utilized in industries including water treatment, wastewater management, chemicals, power generation, life sciences, pharmaceuticals, food and beverage, and a Its primary function is to measure the concentration of dissolved oxygen, enabling the control and monitoring of oxygen levels in water bodies, thereby maintaining water stability and ecological balance.

The core component of the E+H oxygen sensor is its electrode, which comprises an electrode body, electrolyte, and cable. The electrode body, essential for measuring dissolved oxygen concentration, consists of two sensors and an oxygen permeable membrane. One sensor acts as the cathode, while the other serves as the anode.

When the cathode receives a current from the working electrode through the electrode cable's signal line, it begins to adsorb oxygen. Oxygen molecules, upon being adsorbed, combine with ions in water molecules to form oxygen ions. These oxygen ions then migrate towards the anode, releasing electrons before exiting the electrode. These electrons flow back to the working electrode through the cable, completing an oxygen analysis circuit.

E+H oxygen sensors are available in different types, including amperometric and optical sensors. Amperometric sensors utilize a two-electrode system where oxygen diffuses through a membrane and reacts at the cathode, generating a current proportional to the oxygen partial pressure in the medium. These sensors require regular maintenance due to electrode aging.

On the other hand, optical sensors employ the fluorescence method. They have an LED, a photodiode, and a separation part to the medium, which is covered by an oxygen-permeable layer containing labeled molecules excited by orange light and responding with dark red fluorescence. Oxygen molecules attach to the labeled molecules and attenuate (quench) the fluorescence. The photodiode then detects the light intensity, reflecting the oxygen partial pressure in the medium.

Both types of sensors offer high accuracy and reliability, with optical sensors boasting faster availability of stable measurements and minimal maintenance. Additionally, E+H oxygen sensors come with temperature automatic compensation and can be calibrated automatically.

In conclusion, the E+H oxygen sensor is a high-precision, high-reliability field measurement device that plays a vital role in dissolved oxygen measurement across various industries. Its advanced technology, combined with features like fast response, high sensitivity, good stability, and replaceable electrolyte, makes it a key tool for modern water monitoring and control. By understanding its working principle, users can better leverage this technology to monitor and control oxygen levels in water bodies, ensuring water and maintaining ecological balance.