Which component is used to measure steam pressure?

The Bourdon gauge is the correct choice for measuring steam pressure because it is specifically designed to measure pressure in various gases and liquids, including steam. This mechanical device uses a coiled tube that tends to straighten when pressure is applied. As the pressure increases, the tube straightens, and this movement is translated into a dial reading that indicates the pressure level.

Bourdon gauges are commonly found in various industrial applications, especially in systems involving steam, where understanding pressure levels is crucial for safe and efficient operation. Their reliability and straightforward mechanism make them ideal for such measurements.

Other options serve different functions; for example, a thermometer measures temperature and is not suitable for pressure measurement. A hydrometer is used to measure the specific gravity of liquids, which is unrelated to pressure. A manometer, while it is a device for measuring pressure, is not as commonly used in steam applications compared to a Bourdon gauge, which is specifically designed for that purpose and more widely accepted in practice.