Which instrument is best for measuring excess air in the combustion process?

The combustion analyzer is the most suitable instrument for measuring excess air in the combustion process due to its specialized design and functionality. This device provides a comprehensive analysis of combustion gases, allowing for accurate measurements of oxygen, carbon monoxide, carbon dioxide, and other combustion-related components. By analyzing the levels of these gases, one can determine the amount of excess air present in the combustion process.

Excess air is crucial for achieving efficient combustion – too little can lead to incomplete combustion and potentially hazardous emissions, while too much can waste fuel. The combustion analyzer enables operators to make necessary adjustments to ensure optimal air-to-fuel ratios, thus enhancing efficiency and safety.

In contrast, a manometer is primarily used for measuring pressure differences and does not provide the comprehensive gas composition data required to assess excess air. A draft gauge measures the pressure differential in the combustion venting system, which can indicate drafting issues but does not directly assess air levels during combustion. A thermometer, while useful for measuring temperature in various contexts, does not provide any insight into the air-fuel ratio or combustion efficiency.