Depending on the type of analysis, separation of impurities and pollutions is one of the main steps in sample preparation before entering the analyzer.

These impurities and pollutions may be particle type or other impurities such as moisture, the presence of which can damage the analyzer or affect the results of the analysis. There are different types of filters to separate each of these pollutions. Filters are Defined into different types according to the type of sample, temperature, pressure, flow and their applications.

• The different types of filters are as follows:
• Particle filter
• Universal filter 
• Tee filter
• Inline filter 
• Membrane filter 
• Moisture filter 
• Coalescing filter 
• ⦁ ⦁

Filters have two main parts, the body and the filter element, each of which is made in different dimensions and materials according to their application.