DESCRIPTION The Fyreye MKII fixed heat detector (MKII-HF) has a single thermistor arrangement that gives an alarm at a temperature of 90°C. The Fyreye MKII Rate of Rise heat detectors (MKII-HR) uses a thermistor arrangement to sense a quick rise in temperature and also a final threshold temperature of 57°C. The detector will work with most modern fire alarm control panels, and comes supplied with a locking grub screw to prevent unauthorized head removal.
