How does a gas meter bar work?

How does a gas meter bar work?

https://www.youtube.com/watch?v=lUcKI5Q42k4

How do you install a gas meter?

https://www.youtube.com/watch?v=BW420fUgk_8

How much does it cost to add a gas meter?

Gas Meter Type Average Cost ----------------- ------------- Residential Meter $200 – $300 Commercial Meter $400 – $1,000 Install Labor $100 – $300