A method of fabrication of Burnett cells is presented which significantly reduces the error in Burnett data due to the volume change with pressure of the Burnett cell. The Burnett method can be used to generate extremely high precisionP‐V‐Tdata because no volume or mass measurements are required. The new design uses similar, homogeneous, hollow spheres for the Burnett cell in order to eliminate almost completely the usual contribution to the error from volume distortion corrections.