Asenware AW-CSD381 LPCB EN54 approved conventional smoke detector uses a state-of-the-art optical sensing chamber. This detector is designed to provide open area protection and to be used with the most conventional fire alarm panel. The conventional rate of rising heat detector uses thermal components to detect the temperature changes in the environment. It can enable fire alarm when the temperature difference achieved the setting rate of rising temperature value reaches the setting fixed value. It has stable and reliable working performance.