What is the primary function of a manometer?

The primary function of a manometer is to measure pressure, specifically in units of inches of water column (in. WC). This instrument is crucial in various applications, particularly in the field of gas equipment and HVAC systems, where it helps determine the pressure levels of natural gas or propane, ensuring that appliances operate efficiently and safely.

Manometers typically consist of a U-shaped tube filled with a liquid, such as water or mercury. When pressure is applied to one side of the tube, it causes the liquid to rise or fall, indicating the pressure difference. By measuring the height difference of the liquid in the two arms of the tube, technicians can assess the pressure levels and troubleshoot any potential issues with gas flow or appliance performance.

Other options, such as converting gas into liquid, measuring electrical current, or calculating fuel efficiency, do not align with the primary purpose of a manometer. These tasks require different types of instruments and methodologies, emphasizing the specialized nature of the manometer in measuring pressure. Understanding this tool's precise role is essential for those working with gas appliances, allowing them to maintain performance and safety standards effectively.