EMI/RFI FiltersĮMI/RFI Filters are electrical devices that eliminate or minimize EMI (electromagnetic interference) or RFI (radio frequency interference) within a system. Electronic filters are also used to minimize or eliminate electrical noise. There are many types of, and functions for, electronic filters including passive or active, analog or digital, and low pass and high pass. Typical operating frequencies ranges are AF (audio frequency) or IF (intermediate frequency), both of which are power frequencies. They usually operate at frequencies below RF (radio frequency). Electronic FiltersĮlectronic Filters are used primarily to process electronic signals by removing unwanted frequency components or enhancing others. An air filter can remove a variety of filtrands including dusts, fumes, oils, and bacteria. They come in shapes for specific applications such as automobile engines, cleanrooms, range hoods, or furnaces. An air filter system usually consists of a filter element and the housing that contains the element. They are used also to clean the air before exhausting it. Air filters are used in systems that require particulate-free air. Key specifications include the intended application, physical size, filter type, filter media, and air flow rate. Air FiltersĪir Filters are systems or components that remove particulates from air as it passes through filtering elements and can be complete systems or replacement elements alone. Below we list and describe the most common filters by type.
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