What is a Temperature Transmitter? A Temperature Transmitter is a device that converts the signal from a temperature sensor (such as a Thermocouple, RTD , or PT100 ) into a standard analog output signal, typically 4–20 mA. The transmitter processes the input from the connected temperature sensor and transmits a corresponding current signal based on the measured temperature. The output range (4–20 mA) represents the full scale of the sensor’s temperature range, which can be configured as per the required measurement range.  And this signal connected PID controller, PLC & DCS . Key Functions of a Temperature Transmitter 1. Signal Conversion and Amplification The Temperature Transmitter converts the signal from a temperature sensor (e.g., Thermocouple, RTD, PT100) into a standard output signal such as 4–20 mA, 0–10 V, or digital (HART/Modbus) formats. It also amplifies the low-level sensor signal to ensure accurate and stable transmission over long distances. 2. Diagnostics Mod...