Device for converting physical measurement signal or common electrical signal into standard electric signal output or capable of outputting in communication protocol. Temperature transmitter is a kind of instrument which can convert the temperature variable to the standard output signal which can be transmitted. The current transmitter converts the AC current of the main circuit into a constant current loop standard signal and is continuously transmitted to the receiving device.

Temperature current transducer is the temperature sensor signal into a current signal, connected to the two meter, which shows the corresponding temperature. For example, the temperature sensor in the model is PT100, then the role of temperature current transducer is to change the resistance signal into a current signal, the input meter, display temperature.