Which tool is used to measure gas pressure?

The manometer is specifically designed to measure gas pressure in systems. It operates by balancing the pressure of the gas against the weight of a liquid, usually mercury or water, providing a precise measurement of pressure differences. This tool is particularly important in gas fitting, as it can show both positive and negative pressures and is crucial for ensuring that gas appliances are operating safely and within prescribed limits.

While a pressure gauge also measures gas pressure, it is typically used for different applications and may not provide as accurate readings in low-pressure situations. A voltmeter measures electrical potential, and a thermometer measures temperature, which are unrelated to gas pressure measurement. Understanding which tool to use in the context of gas fitting is crucial for safety and functionality in the installation and maintenance of gas systems.