What role does the sintered powder diffusion disk built into the sensor housing play in the working process of the sensor? How does it affect sensor performance?The main function of the sintered powder diffusion disk is to optimize the gas flow and distribution inside the sensor. Its core design feature lies in its porous structure, which is not only fine but also highly complex, providing abundant channels and paths for gas molecules. During the operation of the sensor, these pores act as "highways" for gas molecules, allowing gas to diffuse quickly and effectively inside the sensor. The porous structure of the diffusion disk is carefully designed and manufactured to maximize the contact area between gas molecules and the sensor sensing element. This design ensures that gas molecules are evenly distributed to the surface of the sensing element, thereby avoiding measurement errors caused by uneven gas distribution. When the gas is distributed evenly, the sensing element can more accurately capture changes in gas concentration, thereby providing more accurate data output. In addition, this ability of the sintered powder diffusion disk to evenly distribute gas also plays a key role in improving the response speed of the sensor. Because gas molecules can quickly diffuse into every part of the sensing element, the sensor can respond to changes in gas concentration in a shorter time, thus increasing its response speed.
Secondly, during the gas detection process, there are often various particles, dust or other impurities in the environment. If these impurities enter the sensor, they may cause contamination or physical damage to the sensing element, thereby affecting the measurement accuracy and service life of the sensor. . The sintered powder diffusion disc becomes an effective barrier with its unique porous structure. These pores are precisely sized to allow gas molecules to pass through while blocking larger particles or impurities. When the gas flows through the diffusion plate, impurities are filtered out, and the pure gas can enter the inside of the sensor and contact the sensing element. This filtering capability is critical to sensor performance and longevity. First, it avoids direct contamination of the sensing element by impurities and maintains the cleanliness and sensitivity of the sensing element. Secondly, filtering out large particle impurities reduces the risk of physical damage and protects the integrity of the sensing element. This helps extend the life of the sensor and reduces the need for replacement due to damage.
In addition to the functions of promoting gas diffusion and filtering impurities, the sintered powder diffusion plate also has a function that cannot be ignored, which is to control the gas flow rate. During the operation of the sensor, the gas flow rate is a crucial parameter. Flow rates that are too fast or too slow may adversely affect the sensor's measurement accuracy. Therefore, precise control of gas flow rate is the key to ensuring stable sensor performance. The sintered powder diffusion disc achieves effective control of gas flow rate through its unique pore structure and size design. The size and structure of the pores are carefully calculated and tested to ensure that gas molecules achieve the expected flow rate as they pass through the diffusion disk. When the gas flow rate is too fast, the porous structure of the diffusion plate can slow down the gas flow rate and prevent the sensor from being damaged due to overload or causing inaccurate measurements. When the gas flow rate is too slow, the diffusion plate can provide enough channels so that the gas can quickly reach the sensing element, ensuring that the sensor can quickly respond to changes in gas concentration.
The sintered powder diffusion disk also has a positive impact on the response speed of the sensor. The porous structure of the diffusion disk allows gas molecules to quickly diffuse to the sensing element of the sensor, shortening the response time. This enables the sensor to respond to changes in gas concentration in a shorter time, improving the real-time nature of the measurement. Sintered powder diffusion discs also improve sensor stability. Because the diffusion disk has a filtering function, it can block larger particles and impurities from entering the sensor, thereby reducing sensor performance fluctuations caused by contamination and physical damage. This allows the sensor to maintain stable performance output during long-term operation and improves measurement reliability.
To sum up, the sintered powder diffusion disk built into the sensor housing plays multiple roles in promoting gas diffusion, filtering impurities, controlling flow rate, and improving performance during the working process of the sensor. Together, these features ensure that the sensor works accurately and stably, providing reliable measurement data for a variety of applications.
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