What is the primary function of a gas meter?

A gas meter's primary function is to measure the volume of gas consumed by a customer. This device accurately tracks how much gas is used over a specific time period, which is essential for billing purposes. Utility companies rely on this measurement to charge customers based on their actual usage instead of an estimate, ensuring fair billing practices.

While regulating gas pressure, detecting leaks, and controlling flow rates are important functions in gas management and safety, they are not the central purpose of a gas meter. A gas meter's primary role focuses exclusively on quantifying the amount of gas consumed, making option B the correct answer. Understanding the function of a gas meter highlights its importance in managing energy consumption and facilitating accurate billing in natural gas utilities.