What is the purpose of a transmitter?

The role of a transmitter is primarily to convert the signal from a sensor into a standardized format, which can then be easily interpreted and processed by control systems or monitoring equipment. Sensors often produce raw data that may be in various forms—such as voltage levels, resistance changes, or current variations. The transmitter's function is to translate this data into a consistent output signal, typically in the form of a standardized electrical signal like 4-20 mA or 0-10 V. This standardization ensures compatibility with various components in a control system, facilitating accurate data communication and enabling effective monitoring and control of processes.

Other options, while relevant to instrumentation and control systems, do not directly define the primary function of a transmitter. For instance, amplifying signals is an important function but is not the main role of a transmitter; similarly, data visualization is typically handled by software or display units, and isolating circuit components pertains more to safety and noise reduction than to the transmitter's core purpose.