What type of control is used to monitor the liquid level in a boiler?

The low water cutoff is designed specifically to monitor the liquid level within a boiler. This safety control functions by shutting down the burner if the water level drops too low. Maintaining an adequate water level is crucial for safe boiler operation, as insufficient water can lead to overheating and potential damage to the boiler.

Additionally, the low water cutoff can help prevent dangerous situations such as steam explosions that may occur if the boiler operates without enough water. It plays a critical role in the overall safety system of a boiler, ensuring that it operates within proper water level parameters.

In contrast, a flow switch monitors the movement of fluid within pipes, a pressure gauge indicates the internal pressure of the boiler rather than the water level, and a high limit control functions to shut off the burner or system if the temperature exceeds safe limits, not specifically for monitoring water level. Each of these controls plays an important role in overall system safety and functionality but does not serve the purpose of directly monitoring liquid levels like the low water cutoff does.