Industry Background:
Hydrogen is a colorless, odorless, flammable and explosive gas, which is widely used in industrial production, petrochemical industry and other fields. However, hydrogen's low density and high diffusion coefficient make its detection and monitoring difficult. Therefore, it is of great significance to develop a fast, accurate and reliable hydrogen detector to ensure production safety and environmental protection.
Thermal conduction hydrogen detector technical principle
Hydrogen Detector Thermal conduction hydrogen detector is a hydrogen detection instrument based on the principle of thermal conduction. It works by measuring the change in thermal conductivity of a gas mixture on a heating element, taking advantage of the difference in thermal conductivity between hydrogen and other gases. The following will introduce the technical principles of the heat conduction hydrogen detector in detail.
First of all, it is important to understand that there are differences in heat conduction between different gases. When the gas mixture passes through the heating element, the temperature of the heating element changes due to the heat transfer action between the gas molecules. Different gases have different thermal conductivity coefficients, resulting in different temperature changes as the gas mixture passes through the heating element.
In the heat conduction hydrogen detector, the heating element is usually made of metal materials, such as nickel, chromium, etc. When the gas mixture passes through the heating element, the temperature of the heating element changes, which in turn causes its resistance value to change. By measuring the resistance of the heating element, the thermal conductivity coefficient of the gas mixture can be calculated.
Since the thermal conductivity of hydrogen is quite different from that of other gases, the concentration of hydrogen can be detected by measuring the change in the thermal conductivity of the gas mixture. In practice, it is often necessary to encapsulate the heating element in a constant temperature chamber in order to avoid the influence of the external environment on the measurement results. At the same time, in order to improve the detection accuracy and response speed, it is also necessary to accurately measure and control the temperature and resistance values of the heating element.
In conclusion, the technical principle of the thermal conductivity hydrogen detector is based on the difference in thermal conductivity of different gases, and the detection of hydrogen is realized by measuring the change of thermal conductivity coefficient of the gas mixture on the heating element. This technology has the advantages of speed, accuracy and reliability, and has been widely used in industrial production, petrochemical industry and other fields. In the future, with the continuous progress of technology and the continuous improvement of application requirements, heat conduction hydrogen detectors will be more widely used and developed.