A low cost MWIR thermal imaging line scanner based on a multiplexed PbSe FPA has been developed. It was designed to be mounted on the underside of UAVs to remotely map battlefields. It also has many dual-use commercial applications. The first unit has been tested in the laboratory and in roof-top imaging demonstrations. It has produced excellent imagery. The noise equivalent temperature difference has been measured to be 0.55 C in preliminary tests. An improved FPA will be installed soon in the unit which will significantly reduce the NET.