This paper describes the development of an
enhanced performance passive infrared (PIR) upgrade for current pyroelectric security sensors. This new microbolometer technology has two significant advantages over current sensors: extended detection range and ability to detect developing fire or equipment failure. It may thus be seen as an IR fire detection device complementing other sensors whilst having an extended range for human detection. The results of measurements for targets of interest will be given for a technology demonstrator. Projected performance is described for a new 16x16 FPA, readout and optics designed specifically for this application.