What devices are used for monitoring and managing water levels in a boiler system?

The correct choice highlights the Auxiliary Water Column and Controls, which are essential for monitoring and managing water levels within a boiler system. The Auxiliary Water Column provides a direct way to observe the water levels, often featuring gauges that indicate the operational status of water levels in the boiler. This is crucial for maintaining safe and efficient operation, as improper water levels can lead to overheating, boiler damage, or even catastrophic failure.

The controls associated with the Auxiliary Water Column are responsible for activating alarms and safety mechanisms if the water levels drop below or exceed operational limits. This helps prevent issues such as low water conditions, which can severely affect the boiler’s performance and safety.

In contrast, the other options pertain to different functions within a boiler system. Main Gas Regulators are involved in controlling the flow of gas to the burner, ensuring proper fuel delivery for combustion. Flue Gas Sensors monitor emissions and the efficiency of combustion, while Condensate Pumps are responsible for removing condensate from heating systems and returning it to the boiler. Though all these components are vital to the overall operation of a boiler, they do not perform the specific function of monitoring and managing water levels, making the Auxiliary Water Column and Controls the correct choice for this question.