The temperature transmitter uses thermocouples and thermal resistances as temperature measuring elements. The output signal from the temperature measuring element is sent to the transmitter module, and goes through voltage stabilization filtering, operational amplification, nonlinear correction, V/I conversion, constant current and reverse. After the protection and other circuits are processed, it is converted into a 4-20mA current signal output that has a linear relationship with the temperature.
role
A device that converts physical measurement signals or ordinary electrical signals into standard electrical signal output or can be output by communication protocol. A temperature transmitter is an instrument that converts a temperature variable into a transmittable standardized output signal, and is mainly used for the measurement and control of industrial process temperature parameters. The current transmitter converts the AC current of the main circuit under test into a standard signal of constant current loop, and sends it to the receiving device continuously.

The temperature transmitter converts the signal of the temperature sensor into a current signal and connects it to the secondary instrument to display the corresponding temperature. For example, the model of the temperature sensor is pt100, then the function of the temperature and current transmitter is to convert the resistance signal into a current signal, input the instrument, and display the temperature.