A satellite sensor assembly includes a plastic sensor housing that is mounted to a vehicle structure comprised of sheet metal. 5 or more times the initial CPD concentration; subjecting the CPD dimerization feedstock to CPD dimerization conditions effective to produce a raw DCPD stream comprising 20 wt. In another embodiment, the system comprises a treatment station that is comprised of a first modular unit and a second modular unit that each perform different functions but can readily joined to one another to form a treatment station with the desired features for a particular application.