These are small 7 microns SS 316 sintered cup filters which are threaded to bottom of the sampling dip tube so that the catalyst does not come out while sampling liquid. It is very useful when the catalyst is expensive or pyrophoric. These filters may reduce the rate/flow of the sampling liquid due to resistance offered by fine mesh, hence they need regular cleaning to prevent choking. These catalyst filters are available for 500 mL - 100 L volume autoclaves. Different material and micron-size filters can be provided based on the availability and design conformity.
