The SMART transmitter stands for Single Modular Auto-ranging Remote Transducer.
It is an intelligent transmitter that has an analog output and simultaneously provides digital communication signal based on HART protocol or FOUNDATION FIELDBUS or PROFIBUS.
In general, the simplified smart transmitter diagram shown in the below figure. It consists of a sensor or input circuitry, the microprocessor, memory, and a communication block.
The word multi-variable transmitter is also used sometimes particularly for a device like a smart flow measuring instrument.
This measures absolute pressure, differential pressure, and process temperature. Computes mass flow rate and volumetric flow rate of the process fluid.
The output from the smart transmitter no longer just the primary process variable, but also includes secondary process variables, sensor health, sensor performance characteristics, calibration information, and real-time diagnostics. (These data can be accessed through HART protocol or via fieldbus communication)
All this information is used to improve the process, optimize the performance of the instrument while extending its life, and maximize the productivity of the personnel.
With the advent of the internet, high data speed, and with these smart field instruments and systems are further transformed and become part of IoT (Internet of Things).
Here below are a few points describe Smart Transmitters:
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