VQ621T/2

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Reliable and accurate gas sensing is essential for a wide variety of industries, ranging from safety and industrial process control to environmental monitoring and pollution control. Gas sensors measure the concentration of one or more components in a sample gas. There are a variety of gas sensing methods and technologies, with different advantages and disadvantages. As an example of a gas sensor, the VQ621T/2 is a solid state, catalytic-type gas sensor. In this article, we will discuss the application fields and working principles of the VQ621T/2.

Application Fields

The VQ621T/2 gas sensor is an electrochemical cell with a solid-state catalyst deposited on the sensing surface. It is designed to detect the presence of combustible gases such as natural gas (methane), propane, butane, acetylene, alcohol and other hydrocarbons. It is ideal for applications where long-term stability and reliable performance are required. Such applications include gas leak detection, environmental monitoring, industrial process control, and automotive safety systems.

Functional Principle

The VQ621T/2 is based on the electrochemical oxidation of combustible gases on the catalyst-coated surface. This reaction creates electrons which are released towards the electrode. The amount of electrons released depends on the concentration of the combustible gas. The current passing through the unit is then measured by a microcontroller or other electronic device. Based on the measured current, the concentration of the combustible gas can be determined.

The VQ621T/2 has an internal temperature compensation function which ensures accurate measurements across a wide temperature range. It also features a built-in heater which keeps the sensing element at a constant temperature, providing more reliable and accurate measurements in high-temperature environments. The unit can be configured to work with various digital interfaces such as RS485, 4-20mA, and so on.

Conclusion

The VQ621T/2 is a reliable and accurate gas sensor, designed for applications requiring long-term stability and reliable performance. It is suitable for the detection of combustible gases and features temperature compensation and a built-in heater for more accurate measurements in high-temperature environments. It is ideal for applications such as gas leak detection, environmental monitoring, industrial process control, and automotive safety systems.

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