1、 The function of filter samples

The filter sample of the dust particle counter is mainly used to capture and block dust particles in the air entering the counter, preventing these particles from interfering with the measurement results. The performance of the filter directly affects the measurement accuracy and reliability of the counter.

2、 Analysis content of filter samples

Filtration efficiency

Filtering efficiency is an important indicator for measuring the performance of a filter. It represents the ability of a filter to capture and block dust particles in the air. Generally, the higher the filtration efficiency, the better the filter performance.

The filtration efficiency can be evaluated by comparing the concentration of dust particles in the air before and after the filter. The specific method is to set sampling points before and after the filter, use a dust particle counter to measure the concentration of dust particles in the air, and then calculate the filtration efficiency.

Resistance characteristics

The filter will generate certain resistance during use, which will affect the speed of air passing through the filter. Therefore, it is necessary to analyze the resistance characteristics of the filter to ensure that it does not cause excessive resistance during use, which affects the normal operation of the counter.

The resistance characteristics of the filter can be evaluated by measuring its resistance values at different wind speeds.

Dust holding capacity

The dust holding capacity refers to the total amount of dust particles that the filter can capture before reaching the specified resistance. The larger the dust holding capacity, the longer the service life of the filter.

The dust holding capacity of the filter can be evaluated through experimental testing. The specific method is to continuously inject dust particles into the filter under certain conditions until the resistance reaches the specified value, and then calculate the total amount of injected dust particles.

Other performance indicators

In addition to the three main performance indicators mentioned above, other performance indicators of the filter can also be analyzed based on specific needs, such as breathability, corrosion resistance, etc.

3、 Maintenance and management of filter samples

Regular replacement

The filter will gradually clog and age during use, so it needs to be replaced regularly to ensure its stable performance. The replacement cycle should be determined based on actual usage and the performance characteristics of the filter.

Cleaning and Inspection

Before replacing the filter, the old filter can be cleaned and inspected. However, it should be noted that the cleaning process should be carried out with caution to avoid damaging the filter structure or affecting its filtering effect. During inspection, attention should be paid to the degree of blockage and damage of the filter.

Record and Management

Recording and managing the usage of filters helps track their performance changes and lifespan. It is possible to record the time, model, performance indicators, and other information of each filter replacement, and regularly analyze and summarize the records.

4、 Summary

The analysis of dust particle counter filter samples is an important step in ensuring their stable performance and measurement accuracy. By analyzing and evaluating the performance indicators such as filtration efficiency, resistance characteristics, and dust holding capacity of the filter, the performance characteristics and service life of the filter can be understood, and a reasonable maintenance and management plan can be formulated. At the same time, recording and managing the usage of filters can also help track their performance changes and service life, providing reference for subsequent maintenance and replacement.