Lämpöilmaisin

Lämpöilmaisin, also known as a heat detector, is a type of fire alarm device that responds to heat. Unlike smoke detectors, which are triggered by the presence of smoke particles, heat detectors are activated by a significant rise in temperature or by reaching a predetermined high temperature. This makes them suitable for environments where smoke detectors might produce false alarms due to normal conditions, such as kitchens, garages, or workshops where steam, dust, or cooking fumes are present.

There are two primary types of heat detectors: fixed-temperature and rate-of-rise. A fixed-temperature detector activates when the ambient temperature reaches a specific threshold, typically around 57 degrees Celsius (135 degrees Fahrenheit). A rate-of-rise detector, on the other hand, triggers if the temperature increases rapidly within a short period, even if it hasn't reached the fixed-temperature threshold. This dual functionality allows for quicker detection of fast-developing fires.

Heat detectors are generally less sensitive than smoke detectors to smoldering fires but can be more reliable in certain industrial or commercial settings. They are powered by the fire alarm system or by batteries. Regular testing and maintenance are essential to ensure their proper functioning. The use of heat detectors is often regulated by building codes and fire safety standards, which specify their placement and suitability for different areas.