Fyreye MKII Addressable Rate of Rise Heat Detector with Built In Isolator

The Fyreye MKII Rate of Rise heat detector with built in isolator (MKII-AHRI) uses a thermistor arrangement to sense a quick rise in temperature and also a final threshold temperature of 57°C.

The Fyreye fixed heat detector with built in isolator (MKII- AHFI) has a single thermistor arrangement that gives an alarm at a temperature of 57°C, where the MKII-AHFI/ CS90 gives an alarm above 86°C.