The Working Principle of Electrochemical Gas Sensor

Do you exactly know what are electrochemical gas sensors and what and how do they do? Don’t worry! Because we are here to assist you in knowing and understanding almost everything about their working principle. So, let’s get started:

What are Electrochemical Gas Sensors and What Do They Do?

Electrochemical sensors are those instruments that provide information about the formation of a system in real-time by incorporating a chemically particular layer to an electrochemical transducer( a device that transforms differences in a physical quantity) with the help of gases. They are also called toxic gas sensors, and these are life-saving gadgets.

These sensors are mainly used for identifying oxygen and toxic gases, which are dangerous for our life. Especially, they measure gases concentration within the external circuit with the help of the oxidation and reduction process. These are some examples of electrochemical gas sensors that can help you in different aspects.

· Electrochemical Breathalyzer

· Electrochemical Blood Glucose sensor

· Electrochemical Respiratory CO2 sensor

· Electrochemical carbon monoxide gas sensor

· Electrochemical Oxygen sensor

The Working Principle

Electrochemical sensors are labored depending on the dispersion or diffusion of hobby gas into the sensor, which brings approximately the introduction of an electrical signal. This is similar to gas fixation. The subtle gas this way receives oxidized or dwindled on the detecting terminal. That is how the sensor decides to group a specific gas interior and outdoors circuit. That unique gas may be any gas, but usually, it detects gases like Oxygen and Carbon Monoxide.

The Working of Electrochemical Gas Sensors?

In simple words, it is working like a gas diffusion. The fundamental additives of an electrochemical sensor are a sensing electrode, a counter electrode, and typically a recommended electrode. These electrodes are in contact with a liquid electrolyte in the housing container. The functioning anode is on the inward substance of a Teflon layer that is permeable to gas yet impermeable to the electrolyte, and then electrochemical reactions occur.

Due to oxidation electron flow, move the electrode to the counter electrode by the external circuit. The reduction makes the electrons move from the counter cathode to the functioning anode. Either direction of electron flow generates an electric current that is directly proportional to the concentration of gas.

The current is amplified and detected by electrons that are present in an outer circuit. Output is according to the calibration in scales by having a reading in the engineered unit. These units give the volume of gas in percentage.

Although the working of the electrochemical gas sensor is based on chemical reactions (reduction or oxidation reaction) in the presence of temperature, accurate reading depends on temperature. For example, temperature remuneration is supported for the most exact readings.

The Final Verdict

Now you know that they detect poisonous gases that are harmful to our health. Otherwise, we don’t know what we inhale, and it becomes a cause of death for us. So, it is an extremely useful device because it saves or lives.

We have provided you with the working principle and complete working process of the Electrochemical Gas Sensor for in-depth knowledge. That is how you can learn even better about this pretty beneficial device.