Answer / bala murali/ramesh

It is depending upon the sensor whatever it analog or smart txr.

In smart txr means rerange the txr what range you want upto sensor level.

anlog means fixed range.

Answer / rezvanian

"smart" means that you have a SIMULTANEOUS analogue signal
and digital communication. So HART is "smart" because it
has 4-20 mA and the Bell 202 modulated communication at the
same time. it can also perform diagnosis. I believe that
its not a communication protocol. Smart transmitters can
use any protocol for communication …

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