Intrinsic safety in Field instruments

Hi All,
An externally powered instrument like ultrasonic flowmeter or coriolis flowmeter operating with 120 or 110 V power supply can be Intrinsically safe certified(EX ia).
If Yes how with model reference
if No, Why??

@Achu

Do Not Post Same Question Multiple Times

Hi Santhosh,

I didn’t get satisfying answer. That’s why i have posted again with more clarity

@Achu

Repeating same post will not help you in anyway.

You can add the additional details to the already published question using REPLY option.

@santhosh Thanks for the suggestion.
there are no further details to add . I have clearly asked my query.
Could you please help with answer if any