It is very important to communicate gas measurement data timely, accurately and reliably. Electronic data communication is the transfer of information from one point to another point by a direct connection (wire or cable), telephone line, wave guide (optical fiber), or by wireless media (radio, cellular phone, satellite, microwave, or infrared). The communication link is used to communicate gas measurement data in the form of analog, digital, pulse, serial or parallel data. Variocis type of communication links are used in data communication. The main types of communication links are direct connection, dial-up connection, leased lines, radio links, microwave stations, satellite stations, coaxial cables, fiber optic cables, cellular digital packet data, power line carrier link, and Infrared Link. In addition to the type of media used for communication, protocol also plays an important part in communication of gas measurement data.
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