Which gas measurement tool is used for checking pressure differentials?

The manometer is specifically designed to measure pressure differentials, making it the correct choice. It functions by using a U-shaped tube filled with liquid, typically water or mercury, to measure the difference in pressure between two points. This is especially useful in gas applications where ensuring that the pressure is within safe and operational limits is critical.

Manometers can be utilized in various settings, including HVAC systems and gas pipelines, to ensure proper operation and safety. Their ability to measure small changes in pressure makes them ideal for these applications, allowing technicians to accurately diagnose issues or verify system functioning.

In contrast, the thermometer measures temperature, the calorimeter measures heat transfer in physical and chemical processes, and the barometer measures atmospheric pressure. While each of these tools serves a specific function in different scientific and industrial contexts, they do not provide the capability to measure pressure differentials the way a manometer does. Thus, the manometer is uniquely suited for this specific task in the gas measurement field.