What is a common safety feature in modern boilers?

Pressure sensors are indeed a common safety feature in modern boilers. They play a crucial role in monitoring the internal pressure of the boiler system. By continuously checking for pressure levels, these sensors can detect conditions that may lead to unsafe operation, such as overpressurization, which can result in dangerous explosions or leaks. If abnormal pressure readings are identified, the sensors can trigger automatic safety mechanisms, such as shutting down the boiler or releasing pressure to prevent accidents.

This automation significantly enhances the overall safety of the system, ensuring that operators can maintain a safe working environment. While visual alarms, manual override switches, and heat exchangers are important components in their own right, they do not directly monitor the internal pressures that are critical to boiler safety as effectively as pressure sensors do.