A capacitance based differential pressure sensor for measuring a process variable, the pressure sensor comprising: a cell body having a first exterior end wall, a second exterior end wall, a cylindrical sidewall (38H, 38L), a first interior wall, and a second interior wall, the first and second interior walls facing one another and defining an interior cavity (44H, 44L), wherein the cell body includes an annular first metal cell half surrounding a first insulator region that is fused to first metal cell half and extends from the first exterior end wall to the interior cavity (44H, 44L) without extending to the cylindrical sidewall (38H, 38L) and forms a first surface of the first interior wall, and an annular second metal cell half surrounding a second insulator region that is fused to second metal cell half and extends from the second exterior end wall to the interior cavity (44H, 44L) without extending to the cylindrical sidewall (38H, 38L) and forms a second surface of the second interior wall, wherein the first metal cell half and the second metal cell half extend an entire length of the cylindrical sidewall (38H, 38L); a deflectable diaphragm connected at an outer periphery between the first and second interior walls, the diaphragm separating the interior cavity (44H, 44L) into a first cavity and a second cavity; a first electrode on the first surface; a second electrode on the second surface; a plurality of first electrical leads extending from the first electrode through the first insulator region and out of the first exterior end wall; and a plurality of second electrical leads extending from the second electrode through the second insulator region and out of the second exterior end wall; a first isolation tube extending through the first insulator region from the first cavity to the first exterior end wall; and a second isolation tube extending through the second insulator region from the second cavity to the second exterior end wall, wherein the plurality of first electrical leads extend through the first insulator region parallel to and equidistant from the first isolation tube in a triangular pattern and the plurality of second electrical leads extend through the second insulator region parallel to and equidistant from the second isolation tube in a triangular pattern, wherein a first end of the first isolation tube is in fluid communication with the first cavity and a first end of the second isolation tube is in fluid communication with the second cavity, wherein the first isolation tube includes a second end that terminates adjacent a first isolation diaphragm, and wherein the second isolation tube includes a second end that terminates adjacent a second isolation diaphragm, a first fill fluid within the first isolation tube and the first cavity; and a second fill fluid within the second isolation tube and the second cavity. a cell body having a first exterior end wall, a second exterior end wall, a cylindrical sidewall (38H, 38L), a first interior wall, and a second interior wall, the first and second interior walls facing one another and defining an interior cavity (44H, 44L), wherein the cell body includes an annular first metal cell half surrounding a first insulator region that is fused to first metal cell half and extends from the first exterior end wall to the interior cavity (44H, 44L) without extending to the cylindrical sidewall (38H, 38L) and forms a first surface of the first interior wall, and an annular second metal cell half surrounding a second insulator region that is fused to second metal cell half and extends from the second exterior end wall to the interior cavity (44H, 44L) without extending to the cylindrical sidewall (38H, 38L) and forms a second surface of the second interior wall, wherein the first metal cell half and the second metal cell half extend an entire length of the cylindrical sidewall (38H, 38L); a deflectable diaphragm connected at an outer periphery between the first and second interior walls, the diaphragm separating the interior cavity (44H, 44L) into a first cavity and a second cavity; a first electrode on the first surface; a second electrode on the second surface; a plurality of first electrical leads extending from the first electrode through the first insulator region and out of the first exterior end wall; and a plurality of second electrical leads extending from the second electrode through the second insulator region and out of the second exterior end wall; a first isolation tube extending through the first insulator region from the first cavity to the first exterior end wall; and a second isolation tube extending through the second insulator region from the second cavity to the second exterior end wall, wherein the plurality of first electrical leads extend through the first insulator region parallel to and equidistant from the first isolation tube in a triangular pattern and the plurality of second electrical leads extend through the second insulator region parallel to and equidistant from the second isolation tube in a triangular pattern, wherein a first end of the first isolation tube is in fluid communication with the first cavity and a first end of the second isolation tube is in fluid communication with the second cavity, wherein the first isolation tube includes a second end that terminates adjacent a first isolation diaphragm, and wherein the second isolation tube includes a second end that terminates adjacent a second isolation diaphragm, a first fill fluid within the first isolation tube and the first cavity; and a second fill fluid within the second isolation tube and the second cavity.