What tool is primarily used for measuring gas pressure?

The primary tool used for measuring gas pressure is the manometer. A manometer is specifically designed to measure the pressure of gases in a variety of applications, including in the HVAC and gas technician fields. It operates by comparing the pressure of the gas to a known reference pressure, usually atmospheric pressure, allowing for precise readings of gas pressure in different situations.

While a pressure gauge is often used for similar measurements, manometers provide a higher degree of accuracy and can measure very low pressure ranges effectively, making them particularly valuable in gas applications. They come in several forms, such as U-tube manometers or digital manometers, allowing for versatile use depending on the requirements of the job.

Other tools listed, like a multimeter and a caliper, serve different functions; a multimeter measures electrical properties such as voltage and current, while a caliper is used for measuring dimensions and physical sizes, not gas pressure. This clarity reinforces the unique role that manometers play in accurately assessing gas pressure in various settings.