What is the primary function of a temperature transmitter?

The primary function of a temperature transmitter is to convert temperature measurements into standardized output signals for processing. This process involves taking the temperature readings from a sensor, such as a thermocouple or RTD (Resistance Temperature Detector), and transforming those readings into an electrical signal that can be easily interpreted and utilized by control systems or monitoring devices.

Temperature transmitters ensure that the output signal is consistent and compatible with various control instruments, enabling accurate data processing and reporting. This standardized signal, often a 4-20 mA or a digital protocol like HART, is critical in industrial applications where temperature data needs to be displayed, recorded, or acted upon by other systems.

The other functions listed, such as measuring temperature changes directly, regulating heating and cooling systems, or providing alarms for temperature anomalies, represent different components or functionalities within a temperature control system, but they do not encapsulate the primary role of a temperature transmitter. The transmitter's focus is primarily on signal conversion and processing, making option B the correct answer.