A transmitter is a type of monitoring device that is used to measure and transmit a signal to a remote receiver or monitoring system. It is commonly used in industrial applications to measure and monitor various process parameters such as temperature, pressure, flow rate, level, and pH.
Transmitters are typically designed to convert the physical input signal into an electrical output signal, such as a 4-20 mA current loop, that can be transmitted over long distances without any loss of signal quality. This allows the monitoring system to be located at a remote location, such as a control room, while the actual measurement is being performed on the factory floor or in the field.
Transmitters can be classified based on the type of signal they transmit, such as analog or digital, and the type of input they measure, such as temperature, pressure, or level. They can also be designed for use in specific industries, such as oil and gas, chemical processing, or water treatment.
In addition to transmitting the signal, transmitters often include various features such as calibration adjustments, signal conditioning, and diagnostic functions to ensure accurate and reliable measurement. They can also be designed to operate in harsh environments and be resistant to shock, vibration, and extreme temperatures.