Information about third party inspectors

[iamd]

I want information about tuv company for inspected meters
Which company of tuv can witness on meters calibration
And why
Because this company have many branch like
Tuv hessen and tuv rehlind and another

 

[KENAT]

TUV is not one single company as I recall.

https://en.wikipedia.org/wiki/Technischer_Überwachungsverein

Posting guidelines faq731-376

http://eng-tips.com/market.cfm?

(probably not aimed specifically at you)
What is Engineering anyway: faq1088-1484​