A fire alarm is a device that detects smoke or heat and sounds an alarm to warn people of a fire. Fire alarms are an important safety device that can help to save lives and property.
There are two main types of fire alarms: smoke alarms and heat alarms. Smoke alarms detect smoke, while heat alarms detect heat. Both types of alarms are effective at detecting fires, but smoke alarms are generally more sensitive and can detect fires earlier. However, heat alarms are less likely to be triggered by false alarms.