This test stand is mainly used for testing air filters, that are used in internal combustion engines and compressors for their efficiency according to ISO 5011 standard. The test stand is automatically controlled by the computer and consists of a test channel and other pipes made of a solid stainless steel. Data determination and its handling is generated according to ISO 5011 standard. All the test parameters and measurement results are displayed on the screen in form of a curve and are saved in chronological order.