XPA-CB-11171 Xpander Static Heat Detector (With Mounting Base)The Xpander static heat detector is used in conditions in which smoke detectors are unsuitable. It should be be considered for use if there is a danger of nuisance alarms from smoke detectors. Static heat detectors respond only when a fixed temperature has been reached. Features Integral indicator with 360 visibility Includes Mounting Base Supply voltage is 3V from radio base Sampling frequency is once every 2 seconds Unaffected by wind Meets BS EN50