A sensor assembly for detecting biometric images, the sensor assembly comprising: a first sensor side comprising first pickup elements comprising a first plurality of substantially parallel pickup lines (102, 202); a second sensor side comprising second pickup elements comprising a second plurality of substantially parallel pickup lines (103, 203); a plurality of drive elements comprising a plurality of substantially parallel drive lines orientated transversely to the first and second pluralities of pickup lines, comprising either (i) a first layer of drive elements, a second layer of drive elements, a first insulating layer (104, 204) separating the first layer of drive elements and the first pick up elements, a second insulating layer (105, 205) separating the second layer of drive elements and the second pickup elements, a third insulating layer separating the first layer of drive elements from the second layer of drive elements and a plurality of interconnects connecting the first layer of drive elements to the second layer of drive elements, or (ii) a single layer of drive elements, a first insulating layer (104, 204) separating the single layer of drive elements and the first pick up elements, a second insulating layer (105, 205) separating the single layer of drive elements and the second pickup elements; and a signal source configured to provide a drive signal to at least one of the drive elements resulting in a signal that passes from the drive elements to the first and second pickup elements, wherein the sensor assembly is configured to scan the first pickup elements to generate a first map of features of a first object located proximately to the first sensor side based on changes in the signal received by the first pickup elements from the drive elements and scan the second pickup elements to create a second map of features of a second object located proximately to the second sensor side based on changes in the signal received by the second pickup elements from the drive elements. a first sensor side comprising first pickup elements comprising a first plurality of substantially parallel pickup lines (102, 202); a second sensor side comprising second pickup elements comprising a second plurality of substantially parallel pickup lines (103, 203); a plurality of drive elements comprising a plurality of substantially parallel drive lines orientated transversely to the first and second pluralities of pickup lines, comprising either (i) a first layer of drive elements, a second layer of drive elements, a first insulating layer (104, 204) separating the first layer of drive elements and the first pick up elements, a second insulating layer (105, 205) separating the second layer of drive elements and the second pickup elements, a third insulating layer separating the first layer of drive elements from the second layer of drive elements and a plurality of interconnects connecting the first layer of drive elements to the second layer of drive elements, or (ii) a single layer of drive elements, a first insulating layer (104, 204) separating the single layer of drive elements and the first pick up elements, a second insulating layer (105, 205) separating the single layer of drive elements and the second pickup elements; and a signal source configured to provide a drive signal to at least one of the drive elements resulting in a signal that passes from the drive elements to the first and second pickup elements, wherein the sensor assembly is configured to scan the first pickup elements to generate a first map of features of a first object located proximately to the first sensor side based on changes in the signal received by the first pickup elements from the drive elements and scan the second pickup elements to create a second map of features of a second object located proximately to the second sensor side based on changes in the signal received by the second pickup elements from the drive elements.