What is the primary function of a low water alarm?

The primary function of a low water alarm is to indicate low water levels. In various systems, especially in boilers, maintaining the correct water level is crucial for safe and efficient operation. When water levels drop to a certain point, the low water alarm serves as an early warning signal to prevent potential hazards, such as overheating, equipment damage, or even system failure. This alarm alerts operators to take necessary actions to restore the water level, ensuring continued safe operation and preventing potential disasters associated with low water conditions.

The other functions mentioned are distinct and do not relate to the primary role of the low water alarm. For instance, excessive steam pressure is monitored through different pressure regulation systems, while temperature is typically measured by specific thermometers or sensors designed for that purpose. Controlling the fuel supply is a separate activity that involves managing combustion processes and is not directly associated with monitoring water levels.