XPA-CB-11171-APO XPander Heat Detector (CS) with BaseXPA CB 11171 APO XPander Heat Detector (CS) with Base The XPander Heat Detector responds only when a fixed temperature has been reached. Key Features: Wireless Can be used in applications where smoke detectors are unsuitable Ideal for environments that are dirty or smoky under normal conditions CS detectors are ideal for use in environments with rapid temperature fluctuations such as boiler rooms Bi directional (monitored) radio platform Five year