Mechanical gas meters, often found in residential settings, work by utilizing a diaphragm to measure the flow of gas. As gas passes through the meter, it causes the diaphragm to flex, which is then translated into a measurement of volume. On the other hand, digital or smart gas meters offer enhanced capabilities, including remote reading and real-time data monitoring. These advanced systems enable utility companies and consumers to track gas usage more effectively, leading to better energy management and cost savings.