A device that converts physical measurement signals or ordinary electrical signals into standard electrical signals for output or can output them through communication protocols. A temperature transmitter is an instrument that converts temperature variables into standardized output signals that can be transmitted. It is mainly used for measuring and controlling temperature parameters in industrial processes. A current transmitter converts the AC current of the tested main circuit into a constant current standard signal, which is continuously transmitted to the receiving device.
A temperature and current transmitter converts the signal from a temperature sensor into a current signal and connects it to a secondary instrument to display the corresponding temperature. For example, if the model of the temperature sensor in the figure is PT100, the function of the temperature and current transmitter is to convert the resistance signal into a current signal, input it into the instrument, and display the temperature.