There are several types of gas meters, each designed for specific applications. The most common types include diaphragm meters, rotary meters, and ultrasonic meters. Diaphragm meters, often used in residential applications, are known for their simplicity and reliability. Rotary meters, on the other hand, are typically employed in industrial settings due to their capability to handle large volumes of gas with high accuracy. Ultrasonic meters represent a newer technology that uses sound waves to determine the flow of gas, offering exceptional precision and the ability to measure at various pressures and temperatures.