Burner start-stop thermostat: A device used to set the operating and stopping temperatures of the hot oil boiler. turning off and stopping the burner when the oil temperature increases, turning the burner on or increasing the power level when the oil temperature decreases.

Maximum temperature thermostat: Activates automatically and shuts off the burner and triggers the audible alarm system in case the hot oil temperature rises for unforeseen reasons, such as pump failure, oil blockage, or circulation interruption.

Low-pressure sensor: When oil circulation slows down or stops, it deactivates the burner to prevent the stagnant oil in the coils from burning. This prevents the burning of thermal oil, which has high economic value.

Expansion tank lower level sensor: When the oil level drops to a critical level, the pump may become airlocked, preventing the oil from continuing its turbulent movement and causing partially stagnant oil to burn and lose its properties. Therefore, the sensor first cuts off the burner's power and triggers a warning alarm. At this point and afterwards, if the thermal oil temperature is above 90°C, the pump continues to operate; if the oil temperature is at or below 90°C, the pump stops along with the burner.