XPA-CB-13032-APO XPander Multisensor Detector (Optical/Heat) with BaseXPA CB 13032 APO XPander Multisensor Detector (Optical Heat) with Base The XPander Multisensor Detector is a thermally enhanced smoke detector and as such will not give an alarm from heat alone. It is a development of the XPander optical detector described in the previous chapter and goes further in its capabilities of fire detection.