The product is made  accoding to EN54 .

It is avaible for convential type & addressable type.

The SY-AD800 is an analogue addressable rateof rise

heat detector. It will respond with a valueof 75 if the

detector is triggered by a rate of rise alarm(that is a

fast increase in temperature over a setperiod of time).

The detector also responds to a fixedtemperature of

57°C and will return a value of 95 if thedetector is

triggered by this condition.

The SY-AD800 is an analogue addressablefixed

heat detector. It will respond with a valueof 95 if the

detector is triggered through a fixed heatalarm of 90°C.

Heat detector  SY-800 operates byutilizing a matched pair of thermistors to sense heat. One of thesethermistors is exposed to the ambient temperature, while the otheris sealed inside the detector housing. Under normal conditions,both thermistors register similar reading. As fire happened, thetemperature registed by the exposed thermistor will rise rapidly,resulting in an imbalance, causing the detector to go into itsalarm suitation.