Thermal detectors are essential for use in areas such as bars and kitchens where optical detectors are innappropriate because of the high levels of airnorne contamination to be found.

The flagship of the range gives the ultimate in protection against both slow and fast developing fires. It is a true multi-criteria unit; the output levels from both the optical chamber and the thermistor are continuosly monitored by the onboard processor, using algorithms developed specially for the unit. An alarm signal is only enabled in case the processor is satisfied that an incipient fire has been detected by using a combination of inputs, the incidence of nuisance alarms is reduced while at the same time, the response time to an actual fires is also improved.