This detector is designed to ensure the detection ability for temperature change during per-fire period. Combination of two different heat detection functions could make the product with more safety and reliability.

When there is smoke or heat during per-fire period, field situation will become very due to different environments. This combination design is ensures that the per-fire confirmation will not be effected by varying environments.

When detector's ambient temperature has reached the per-fire standard ( operative temperature ), sensor's dual metal plate will bend for conduction
(dual metal are two connected metal with different inflation factors, it will bend by inflation when heat is up to certain degree ) and issue the signal to control panel

This detector is design to ensure the detection ability for temperature change during pre -  fire period. Combination of two different heat detection functions could make the product with more safe and reliable. When detector's ambient temperature rises rapidly and has reached the per-fire standard (Rate-of-Rise ), or the ambient temperature is reached 58 °C ( fixed - Temperature ) than the fire signal will be sent to control panel.

When detector's ambient temperature is 58 °C ( Fixed-Temperature ) then the fire signal will be sent to control panel Detecto itself has about balance function when temperature changed reapidly so false alarm wouldn't happen.