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 reliableinstruments available for this purpose, the E+H oxygen sensorstands out for its high precision and reliability. This articleaims 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 includingwater treatment, wastewater management, chemicals, powergeneration, life sciences, pharmaceuticals, food and beverage, anda Its primary function is to measure the concentrationof dissolved oxygen, enabling the control and monitoring of oxygenlevels in water bodies, thereby maintaining water stabilityand ecological balance.

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

When the cathode receives a current from the working electrodethrough the electrode cable's signal line, it begins to adsorboxygen. Oxygen molecules, upon being adsorbed, combine with ions inwater molecules to form oxygen ions. These oxygen ions then migratetowards the anode, releasing electrons before exiting theelectrode. These electrons flow back to the working electrodethrough the cable, completing an oxygen analysis circuit.

E+H oxygen sensors are available in different types, includingamperometric and optical sensors. Amperometric sensors utilize atwo-electrode system where oxygen diffuses through a membrane andreacts at the cathode, generating a current proportional to theoxygen partial pressure in the medium. These sensors re maintenance due to electrode aging.

On the other hand, optical sensors employ the fluorescence method. They have an LED, a photodiode, and a separationpart to the medium, which is covered by an oxygen-permeable layercontaining labeled molecules excited by orange light and respondingwith dark red fluorescence. Oxygen molecules attach to the labeledmolecules and attenuate (quench) the fluorescence. The photodiodethen detects the light intensity, reflecting the oxygen partialpressure in the medium.

Both types of sensors offer high accuracy and reliability, withoptical sensors boasting faster availability of stable measurementsand minimal maintenance. Additionally, E+H oxygen sensors come withtemperature automatic compensation and can be calibratedautomatically.

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