What is a critical function of a low water cut-off device in boilers?

A critical function of a low water cut-off device in boilers is to ensure proper water levels. This device plays an essential role in monitoring the water level within the boiler. If the water level drops below a certain threshold, the low water cut-off device will shut off the burner or heating element. This is vital because adequate water levels are necessary for safe operation; too low of a water level can lead to overheating and potential damage to the boiler, risks of explosions, or other hazardous conditions.

Maintaining the appropriate water level helps to avoid situations where the boiler could run dry, which could lead to serious safety issues. Thus, the function of ensuring proper water levels is not only critical for the boiler's efficiency but also for the safety of the operation.