What are the important points needs to be checked while buying Pressure and temperature transmitters??

 

[What are the important points needs to be checked while buying Pressure
and temperature transmitters??]

compatibility with the material involved (acid, caustic, etc.)

compatibility with the environmental conditions involved (temperature, hazardous classification)

signal compatibility (4-20 mA, voltage, HART, etc)

spare parts requirements (the plant may stock certain things and expects those are what is used)

calibration ranges

special purchasing arrangements that may or may not be involved

There are likely a bunch more.