The heat detector we are offering is a fire alarm device that is designed to detect temperature changes & warn building occupants of a fire. These are typically used in areas where smoke detectors may not be suitable, such as in dusty or dirty environments, or areas with high levels of moisture or humidity. They are often used in conjunction with smoke detectors to provide comprehensive fire detection and warning systems. Heat detectors work by detecting a rapid rise in temperature or a fixed temperature threshold, and then sounding an alarm.