Integrated aftertreatment system

A sensor mount 1000 comprises a first and a second sensor mounting plate 1010 with sensor modules coupled thereto. At least a portion of the second sensor mounting plate is disposed between the first sensor module and the second sensor module. The sensor mount may be mounted to a housing comprising a catalyst 992 (e.g. catalytic convertor in exhaust gas aftertreatment system). The sensor mount may comprise attachment points for attachment using straps (1120, figure 17). The sensor modules are stacked in tiers above the exhaust component, thereby reducing its overall footprint. Also disclosed is particle filter coupling (figure 8), a pressure sensor assembly (figure 21), an electrical connector (figure 5), and a mold (figure 22) for sealing an electrical connector; all suitable for use in integrated exhaust aftertreatment systems.