What is Temperature Transmitter?
A temperature transmitter is an instrument that converts a temperature variable into a standardized output signal that can be transmitted, mainly used for the measurement and control of temperature parameters in industrial processes.
Transmitter with sensor usually consists of two parts: sensor and signal converter. The sensor is mainly a thermocouple or thermal resistance; the signal converter is mainly composed of a measuring unit, a signal processing and conversion unit (because the industrial thermal resistance and thermocouple indexing table are standardized, the signal converter is also called as an independent product Transmitter), some transmitters increase the display unit, and some also have field bus function.
If the transmitter is composed of two sensors for measuring the temperature difference, there is a given continuous function relationship between the output signal and the temperature difference. It is called a temperature transmitter.
There is a given continuous function relationship between the output signal of the transmitter and the temperature variable (usually a linear function). The output signal of the early-produced transmitter has a linear function relationship with the resistance value (or voltage value) of the temperature sensor .
The standardized output signal is mainly 0mA~10mA and 4mA~20mA (or 1V~5V) direct current signal. Other standardized output signals with special regulations are not excluded. Temperature transmitters can be divided into two-wire system and four-wire system according to the power supply wiring mode, except for the three-wire system of RWB temperature transmitter.
Transmitter has electric unit combination instrument series and miniaturized modular, multi-functional intelligent type. The former does not have a sensor, and the latter two types of transmitters can be easily combined with a thermocouple or thermal resistance to form a transmitter with a sensor.
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