An accelerometer may include a seismic mass to flex based on acceleration components perpendicular to a surface of a substrate. The seismic mass may include a first electrode and a portion of the substrate. A first surface of the seismic mass may be adjacent to a first cavity in the substrate, and a second surface of the seismic mass being adjacent to a second cavity. The first surface of the seismic mass and the second surface of the seismic mass may be on opposite sides of the seismic mass. The accelerometer may include a second electrode separated from the second surface of the seismic mass by at least the second cavity.