Filtronetics offers a line of frequency products for diverse applications ranging from communications to instrumentation for commercial, industrial and military applications. The company is capable of providing custom liquid crystal, microwave, ceramic and crystal filters available. Filter types Filtronetics offers include bandpass, low pass, high pass, notch diplexer and dual band. In addition to custom filters, the company offers a line of crystals, monolithic filters and oscillators. Its customer base ranges from university researchers to Fortune 500 companies. Filtronetics is located in Kansas City, Mo.