Which tool is commonly used to measure gas pressure?

The manometer is specifically designed to measure the pressure of gases and is widely used in various applications, including HVAC systems. It works by comparing the pressure of a gas to a reference pressure, usually atmospheric pressure, allowing technicians to determine if gas pressures within a system are operating within acceptable ranges. This measurement is critical for ensuring that gas appliances function safely and efficiently, helping to diagnose issues related to gas supply and combustion efficiency.

Other tools mentioned have different functions. A barometer measures atmospheric pressure, a thermometer measures temperature, and a voltmeter measures electrical potential difference. While these instruments are important in their respective areas, they do not provide the necessary measurements of gas pressure needed in HVAC applications. Understanding the specific purpose of the manometer is essential for anyone working with gas systems to ensure proper system performance and safety.